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A US Marine performs plyometric jumps in Camp Foster, Okinawa

Plyometrics, also known as plyos, are exercises in which muscles exert maximum force in short intervals of time, with the goal of increasing power (speed-strength). This training focuses on learning to move from a muscle extension to a contraction in a rapid or "explosive" manner, such as in specialized repeated jumping.[1] Plyometrics are primarily used by athletes, especially martial artists, sprinters and high jumpers,[2] to improve performance,[3] and are used in the fitness field to a much lesser degree.[4]

Overview

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Plyometrics include explosive exercises to activate the quick response and elastic properties of the major muscles. It was initially adopted by Soviet Olympians in the 1950s, and then by sportspeople worldwide.[5] Sports using plyometrics include basketball, tennis, badminton, squash and volleyball as well as the various codes of football.[6] The term "plyometrics" was coined by Fred Wilt after watching Soviet athletes prepare for their events in track and field.[7] He began a collaboration with trainer Michael Yessis to promote plyometrics.

Since its introduction in the early 1980s, two forms of plyometrics have evolved. In the original version, created by Russian scientist Yuri Verkhoshansky, it was defined as the shock method.[8][9] In this, the athlete would drop down from a height and experience a "shock" upon landing. This in turn would bring about a forced eccentric contraction which was then immediately switched to a concentric contraction as the athlete jumped upward. The landing and takeoff were executed in an extremely short period of time, in the range of 0.1–0.2 second.[9] Explosive plyometrics describes the approach originally created by Verkhoshansky.[3] He experimented with many different exercises, but the depth jump appeared to be the best for duplicating the forces in the landing and takeoff.

The second version of plyometrics, seen to a greater extent in the United States, involves any form of jump regardless of execution time.

Etymology

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The term plyometric is a combination of Greek words πλείων (pleíōn), which means "more", and μέτρον (métron) "measure". Fred Wilt admits that it is not a very good term, but it was the best he could come up with. The spelling that would match the Greek origin is pliometrics.[10] Several imaginary Greek words that would explain the y have been cited.[11][12][13]

History

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See also: History of physical training and fitness

Fred Wilt, a former US Olympic long-distance runner, is credited with coining the term plyometrics after watching the Russians execute jumps in their warm-ups prior to their event in track and field. He could not understand why the Russians were doing all of these jumps while the Americans were doing multiple static stretches, but he firmly believed it was one of the reasons why they were so successful in many events.[7] From its beginnings in the early 1980s, the term plyometrics gained greater popularity and is now well established. When Fred Wilt learned of the work being done by Michael Yessis in the field of Russian training methods, they quickly teamed up to help disseminate information on plyometrics.

In collaboration with Yessis who visited and worked with Verkhoshansky[14] in the Soviet Union in the early 1980s, plyometrics was gradually disseminated in the US. Yessis brought this information on plyometrics back to the US and in the following years was able to create even more ways of using this method to train and improve explosive power.

Plyometrics (the shock method) was created by Yuri Verkhoshansky in the late 1960s, early 1970s.[9] Since then, the shock method of plyometrics is still being practiced for improvement of athletic performance by what appears to be a relatively limited number of athletes. These athletes still do depth jumps, the key exercise in the shock method, according to the guidelines established by Verkhoshansky.

Most athletes execute simple and complex jumps and call them plyometrics rather than jump training as it was called in the past. This includes the depth jump which was executed in ways different from what was recommended by Verkhoshansky. This form of jump training is very popular but plyometrics is a buzzword for all types of jumps, regardless of how long it takes to execute the jump. Its use is so pervasive that it is even possible to find push-ups described as being plyometric.

Due to the wide use and appeal of the term plyometrics, the true meaning of plyometrics as developed by Verkhoshansky has for the most part been forgotten. Verkhoshansky was well known and respected worldwide in both the scientific and in the coaching arenas. He was relatively unknown in the United States except for some of his articles that were translated and published in the Soviet Sports Review, later called the Fitness and Sports Review International.

In addition to creating the shock method, Verkhoshansky is credited with developing the stretch-shortening concept of muscle contractions and the development of specialized (dynamic correspondence) strength exercises. Plyometrics, or more specifically the shock method, is considered a form of specialized strength development.

Before undertaking plyometric training, it is necessary to distinguish jumps that are commonly called plyometric and true plyometric jumps as exemplified in the depth jump which is illustrative of the shock method. Since its inception in the former Soviet Union as the shock method, there have been other forms of the plyometric exercises created by Yessis that do not involve jump exercises. For details and illustrations of these exercises see "Explosive Running"[15] and "Explosive Plyometrics".[3] These exercises involve the stretch-shorten concept that underlies the shock method.

Exercises

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A box jump
  • Squat jump (jumping squat, jump squat): combination of jump (not to be confused with tuck jump) and squat. Squat down then jump off the ground as high as possible, with extended and vertical legs.[16]
  • Tuck jump (tucked jump, tucked knee jump): with feet shoulder width apart, jump, tuck the legs in, extend them, and land.[16]
  • Tuck squat jump: combination of tuck jump and squat jump. Squat down, jump, bring knees up before landing again.
  • Lateral jump: from a standing position, jump side to side.[16]
  • Power skipping: on each skip, lift the upper leg as high as possible.[16]
  • Alternate leg bounding: run with long strides, placing emphasis on hang time.[16]
  • Box jumps: jump onto and off of a large box 18" or higher.[16]
  • Vertical depth jump: starting from the top of a box, jump down and back up as fast as possible.[16]
  • Plyometric push-up (plyo push-up): perform a push up, but exert enough upward force to lift the hands and body off the ground.[16]
  • Broad jump (long jump).
  • Pike jump.[17]
  • Straddle jump (similar to split jumps used by dancers, gymnasts and figure skaters).
  • Lunge jump[18]

Method

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In the depth jump, the athlete experiences a shock on landing in which the hip, knee, and ankle extensor muscles undergo a powerful eccentric contraction. For the muscles to respond explosively, the eccentric contraction is then quickly switched to the isometric (when the downward movement stops) and then the concentric contraction, in a minimum amount of time.[19] This allows the athlete to jump upward as high as possible.

In the eccentric contraction, the muscles are involuntarily lengthened, while in the concentric contraction, the muscles are shortened after being tensed. Most of the stretching and shortening takes place in the tendons that attach to the muscles involved rather than in the muscles. To execute the depth jump, the athlete stands on a raised platform, usually not greater than 20–30 inches (51–76 cm) high, and then steps out and drops down in a vertical pathway to make contact with the floor. The height used by most athletes is usually quite low in the early stages of training. The key is how high the athlete jumps in relation to the height of the takeoff platform. Technique and jump height are most important at this time. While the body is dropping, the athlete consciously prepares the muscles for the impact by tensing the muscles. The flooring upon which the athlete drops down on should be somewhat resilient, mainly for prevention of injury. Upon making contact with the floor, the athlete then goes into slight leg flex to absorb some of the force for safety. However, the main role played by the muscles and tendons is to withstand the force that is experienced in the landing. This force is withstood in eccentric contraction. When muscle contraction is sufficiently great, it is able to stop the downward movement very quickly.

This phase is sometimes called the phase of amortization in which the athlete absorbs some of the force and stops downward movement by the strong eccentric contraction of the muscles. The strong eccentric contraction prepares the muscles to switch to the concentric contraction in an explosive manner for takeoff.

When the athlete drops down to the floor, the body experiences an impact upon landing. The higher the height of the step-off platform, the greater the impact force upon landing. This creates a shock to the body which the body responds to by undergoing a strong involuntary muscular contraction to prevent the body from collapsing on the ground. This in turn produces great tension in the muscles and tendons which is then given back in a return upward movement. The faster the change in the muscular contractions, the greater the power created and the resulting height attained.[9]

More specifically, the muscles and tendons undergo a stretch (eccentric contraction) while landing which is needed to absorb some of the force generated but most importantly, to withstand the force that is produced by the shock that occurs on the landing. The greater the shock (forces experienced on landing), the stronger the eccentric contraction will be, which in turn produces even greater tension. This tension, which is potential force, is then given back in the return movement when the muscular contractions switch to the concentric or shortening regime.[3]

However, for maximum return of energy, minimum time must elapse from when the force is received to when they are returned. The greater the time between receiving the forces and giving them back, the less is the return and the less the height that can be achieved in the jump. Most of the lengthening and shortening occurs in the respective muscle tendons which have greater elasticity.

Another way of saying this is that the faster the switching from the eccentric to the concentric contraction, the greater will be the force produced and the greater the return movement. The speed of the switching is extremely fast, 0.20 seconds or less. For example, high-level sprinters execute the switch from the eccentric contraction that occurs when the foot hits the ground to the concentric contraction when the foot breaks contact with the ground in less than 0.10 seconds. In world-class sprinters, the time is approximately 0.08 seconds. The exact platform height used by most athletes in the depth jump should be less than 30 inches (76 cm) in the early stages of training. Most athletes start at approximately 12 inches (30 cm) after doing some jump training. They then gradually work up to 20 inches (51 cm) and then to 30 inches depending upon how well the jumps are executed. The main criterion is that the athlete is jumping as high as possible on every jump.

If the athlete gradually improves his jump height, the same platform height is continued until increases in jump height are no longer observed. At this time, takeoff height is increased by a few inches. If the athlete continually fails to jump very high, the height of the drop-down is lowered somewhat.[20] Most important here is how high the athlete jumps after the drop-down.

The maximum platform height used by a high level athlete is no more than 40 inches (100 cm). Rather than developing greater explosive power this height leads to more eccentric strength development. Going higher than 30 inches (76 cm) is usually counterproductive and may lead to injury. This occurs when the intensity of the forced involuntary eccentric contraction upon landing is greater than the muscles can withstand. In addition, the athlete will not be able to execute a quick return (fast transition between muscular contractions), which is the key to successful execution of explosive plyometrics.

Because of the forces involved and the quickness of execution, the central nervous system is strongly involved.[21] It is important that the athlete not overdo using the shock plyometric method. Doing so will lead to great fatigue, and, according to Verkhoshansky, sleep disturbances.[22] Athletes have great difficulty sleeping well if they execute too many depth jumps. This indicates that athletes must be well-prepared physically before doing this type of training.[22]

Technique of jumping is also very important when executing plyometric exercises. In essence, the athlete goes into a slight squat (crouch) upon landing in which the hip, knee, and ankle joints flex. The takeoff or jump upward is executed in a sequence initiated by hip-joint extension followed by knee-joint extension which begins during the hip-joint extension. As the knee-joint extension is taking place, ankle-joint extension begins and is the only action that occurs as the takeoff (breaking contact with the ground) takes place. All three actions contribute force to the upward jump, but the knee-joint extension is the major contributor.[15]

As simple jumping

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The most common type of plyometrics used in the United States is simple and relatively easy jump exercises executed with little regard to execution time. These jumps are effective for athletes who execute skills in their sport that do not require explosive type muscular contractions. An example is long-distance running in which the runners execute repeat actions of 20 to 30 consecutive jumps and other cyclic-type activities such as leaping for multiple repetitions.[15]

Such plyometric jumps are also used as a warm-up for doing explosive plyometric jumps and for initial preparation of the muscles prior to undertaking exercises such as depth jumps. In essence, they are effective in the early stages of learning how to do plyometric exercises and for preparing the muscles for explosive or quick jumps. These jumps are similar to those done by youngsters in the playground or in neighborhood games and as such, do not require additional preparation. Athletes, regardless of their level of expertise, can undertake such jumps in the initial stages of training.

When athletes who have been doing plyometrics without regard to time of execution first attempt to execute explosive plyometrics, they often fail because the time of execution is too long. This occurs quite often in the depth jump. The athlete usually sinks (drops) too low which takes too long to make the transition from the eccentric to the concentric contraction. As a result, the exercise becomes a jump-strength exercise and not a true plyometric one.

Jump technique remains the same regardless of whether it is a true plyometric exercise or a jump exercise. The hips, knees, and ankles flex when landing and the joints extend on the upward return. The sequence and overlapping in the sequence is basically the same, beginning with the hip extension, followed by knee extension, and ending with the ankle-plantar flexing. The major differences in execution are the depth of the landing and the time of executing the switch from the eccentric to the concentric contraction.

Studies have been conducted testing ten various plyometric exercises on overall performance during jumping examined by EMG, power, and ground reaction force (GRF). Of the ten exercises, the single-leg cone hops, box jumps, tuck jumps, and two-legged vertical jumps produced the highest EMG values, alluding to greater motor recruitment. Power was examined in dumbbell jumps, depth jumps, countermovement jumps, squat jumps, and tuck jumps which all produced the higher power scale readings. In terms of athletic performance and training, the plyometric movements that utilize total body vibration produced an overall increase in performance output. A recent study examined two groups using the same plyometric protocol in combination with weight training, one using high loads and the other utilizing small loads, and similar decreases in power were found. This shows that the plyometric exercises themselves had a greater effect in the decrease in power output rather than the type of weight training.[23][24][25]

Safety considerations

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Plyometrics have been shown to have benefits for reducing lower extremity injuries in team sports while combined with other neuromuscular training (i.e. strength training, balance training, and stretching). Plyometric exercises involve an increased risk of injury due to the large force generated during training and performance, and should only be performed by well conditioned individuals under supervision. Good levels of physical strength, flexibility, and proprioception should be achieved before beginning plyometric training.

The specified minimum strength requirement varies depending on where the information is sourced and the intensity of the plyometrics being performed. Chu (1998) recommends that a participant be able to perform 50 repetitions of the squat exercise at 60% of his or her body weight before doing plyometrics. Core (abdomen) strength is also important.

Flexibility is required both for injury prevention and to enhance the effect of the stretch shortening cycle. Some advanced training methods combine plyometrics and intensive stretching in order to both protect the joint and make it more receptive to the plyometric benefits.[26]

Proprioception is an important component of balance, coordination and agility, which is also required for safe performance of plyometric exercises.

Further safety considerations include:

  • Age: should be taken into account for both prepubescent and the elderly because of hormonal changes.
  • Technique: a participant must be instructed on proper technique before commencing any plyometric exercise. He or she should be well rested and free of injury in any of the limbs to be exercised.

Plyometrics are not inherently dangerous, but the highly focused and intense movements used in repetition increase the potential level of stress on joints and musculo-tendonous units. Therefore, safety precautions are strong prerequisites to this particular method of exercise. Low-intensity variations of plyometrics are frequently utilized in various stages of injury rehabilitation, indicating that the application of proper technique and appropriate safety precautions can make plyometrics safe and effective for many people.

Benefits

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Many professional and Olympic athletes use plyometrics training to improve muscular strength and jumping abilities which therefore increases their power. There are varying levels of intensity to plyometrics. Another benefit of plyometrics is that you can vary your level of intensity which means anyone looking to improve strength and jumping training can be involved regardless of fitness. With there being so many exercises this means you are less likely to get burned out and have a wide range of exercises to choose from. Another good reason with so many exercises being available are that you can find exercises that don't require the use of any equipment. It also increases muscular strength and endurance, also increases metabolic rate which increases weight loss and heart rate.[27]

Loaded plyometrics

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A vertical jump with two 15kg dumbbells held just above the shoulders.

Plyometric exercises are sometimes performed with an additional load, or weight added. In such cases, they are referred to as loaded plyometrics or weighted jumps. The weight is held or worn. It may be in the form of a barbell, trap bar, dumbbells, or weighted vest. For instance, a vertical jump whilst holding a trap bar or jumping split squats whilst holding dumbbells. In addition, a regular weight lifting exercise is sometimes given a plyometric component, such as is found in a loaded jump squat. Jumping onto plyo boxes or over hurdles whilst holding weights is not recommended for safety reasons. The advantage of loaded plyometric exercises is that they increase the overall force with which the exercise is performed. This can enhance the positive effect of the exercise and further increase the practitioner's ability to apply explosive power.[28]

Unilateral plyometrics

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Main article: Unilateral training

Unilateral plyometrics are jumping exercises which involve only one foot being in contact with the ground at some stage. This can include jumping off of, and landing on, the same foot i.e. hopping, jumping from one foot and then landing on the other, jumping from one foot and landing on two, or jumping off two and landing on one. It typically makes more intense demands on the legs than bilateral plyometric training and can be used to further enhance explosive power.[29] The intensity of the exercises can be manipulated through the adjusting of box and hurdle height, and any weight which is held or worn.[30] The greatest intensity can be achieved whereby the height or the distance travelled is maximised.[31]

A hop test involves a comparison between the hopping height or distance achievable by the left and right legs, considered separately. It is used to assess the relative strength levels of each leg and whether there is a muscle imbalance i.e. a strength discrepancy between the left and right sides which results in a significant variation in the results. If such an imbalance is found, unilateral plyometrics may be used to alleviate it.[32] As the legs are used singly, and perform the same amount of work, the body and legs may be strengthened more evenly than bilateral plyometrics, which may involve one leg doing an excessively large amount of the work.

Some forms of unilateral plyometrics involve a cyclic alternation between the legs e.g. repeatedly jumping from one foot to the other. As runners perform a similar action of alternating between left and right legs, and each step has an acceleration phase like a jump does, then based upon this commonality, such unilateral plyometrics are considered to transfer effectively to running and sprinting and improve performance.[33]

See also

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References

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Further reading

[edit]
Revisions and contributorsEdit on WikipediaRead on Wikipedia

Plyometrics

View on Grokipedia
from Grokipedia
Plyometrics is a form of exercise training characterized by high-velocity, explosive movements that exploit the stretch-shortening cycle—a rapid sequence of eccentric (lengthening under tension) followed immediately by concentric contraction (shortening)—to maximize production and improve neuromuscular efficiency. Developed primarily for athletes, it focuses on activities such as jumps, bounds, and throws to build power, speed, and coordination in short bursts. The origins of plyometrics trace back to in the mid-20th century, where it was initially known as "jump training" or the "shock method" and systematically organized by Soviet coach and scientist Yuri Verkhoshanski in the late 1960s to enhance performance among athletes. The term "plyometrics" was coined in 1975 by American track coach Fred Wilt, who popularized the technique in the West after observing Soviet training regimens; it derives from the Greek word "plythyein," meaning "to increase." Originally targeted at lower-body development for sports like and , plyometric training has since expanded to include upper-body exercises and applications in rehabilitation, with adaptations for diverse populations including older adults to promote and prevent falls. Plyometric training offers substantial benefits for and , including enhancements in muscle strength, power output, balance, , and cardiorespiratory , as evidenced by meta-analyses showing small to moderate improvements across various parameters such as jump height, sprint speed, and overall athletic capability. It activates fast-twitch muscle fibers and improves and kinesthesia, making it particularly effective for explosive and reducing through better neuromuscular control when progressed appropriately. However, due to its high-impact nature, plyometrics carries risks of stress, muscle strains, and overuse , especially to the knees, ankles, and spine; it is contraindicated for individuals with disorders like , , or inadequate foundational strength, and requires proper warm-up, technique, and supervision to mitigate these hazards. Beginners should start with low-intensity variations on forgiving surfaces to build tolerance gradually.

Introduction

Overview

Plyometrics is a form of exercise training characterized by explosive movements that link eccentric (muscle lengthening or stretching) and concentric (muscle shortening) actions to produce maximal power output in the shortest possible time. This approach leverages the rapid transition between these phases to enhance muscle reactivity and force generation, distinguishing it from traditional strength training. In athletic contexts, plyometrics serves as a key modality for developing speed, agility, jumping ability, and explosive strength, applicable across various sports including , , and soccer. Representative movements such as box jumps—where an individual leaps onto a raised platform—and depth jumps— involving a drop from height followed by an immediate rebound—illustrate the high-intensity, reactive demands of plyometric exercises. As of 2025, plyometrics is widely incorporated into fitness programs for elite athletes seeking performance edges as well as general populations aiming for improved power and coordination, bolstered by recent research affirming its versatility and efficacy.

Etymology

The term "plyometrics" derives from word plethyein, meaning "to increase" or "to multiply," combined with the "-metrics," referring to measurement, to encapsulate the concept of enhancing explosive power through rapid muscle actions. American coach Fred Wilt coined the term in 1975 to describe training methods involving a "stretch and " , inspired by observations of Soviet athletes' dynamic preparations. The word entered American literature in the mid-1970s, marking a shift from earlier Soviet terminology centered on the "shock method," a training approach developed by Yuri Verkhoshansky that emphasized depth jumps to induce rapid eccentric-concentric muscle transitions. This evolution adapted techniques for Western audiences, with Wilt popularizing the concept through coaching resources and collaborations, such as with Michael Yessis, to bridge biomechanical principles into practical athletic programming. In usage, "plyometrics" is often abbreviated as "plyos" and interchangeably referred to as "jump training" in contexts, though it specifically denotes exercises leveraging the stretch-shortening cycle rather than general ballistic movements, which may include non-cyclic projections like medicine ball throws. This distinction highlights plyometrics' focus on elastic energy storage and release, setting it apart from broader paradigms.

Historical Development

Origins

The conceptual roots of plyometrics extend to , where Olympic athletes incorporated jumps and bounds into their training regimens as part of the , utilizing —stone or lead hand weights—to generate explosive force in the , a series of jumps, with total distances often exceeding 15 meters according to historical accounts. These practices emphasized rapid, powerful movements akin to modern reactive training, forming an early foundation for enhancing athletic explosiveness. In the early , specifically from 1919 to 1930, athletics coaches in Northern and prescribed the first sessions of plyometric training for their athletes, observing the performance advantages of explosive bounds and jumps in events and noting how such movements built superior reactive capabilities over traditional strength exercises, which influenced the systematic development of specialized training. The formalization of plyometrics emerged in the during the late , pioneered by Yuri Verkhoshansky, a prominent coach working with Olympic weightlifters and jumpers. Verkhoshansky devised the "shock method," a approach centered on depth jumps—drops from elevated platforms followed by immediate maximal rebounds—to amplify reactive strength through intense eccentric loading and rapid concentric response. This method was specifically tailored to elevate explosive power in elite competitors, yielding notable results such as multiple athletes achieving "Master of Sport" status. Verkhoshansky's foundational research culminated in his 1964 study, which provided that the shock method's eccentric emphasis produced substantial power gains, including enhanced sprint and jump performance among trained athletes like Boris Zubov, who set European and Soviet records. In the 1960s, American coach Fred Wilt introduced these Soviet techniques to the after observing their application among elite jumpers, later coining the term "plyometrics" in 1975 to encapsulate the method's focus on measurable increases in dynamic strength.

Evolution and Popularization

During the 1970s and 1980s, plyometrics gained traction in Western athletic programs, particularly through the dissemination of Soviet training methodologies to the . Fred Wilt, a prominent American coach, popularized the term "plyometrics" in 1975 after observing Eastern European jumpers, marking a key moment in its adoption by U.S. coaches and institutions. This period saw integration into NCAA and other sports, with early research validating its efficacy for explosive power development, leading to widespread use in collegiate training by the early 1980s. Yuri Verkhoshansky's 1977 publication, Fundamentals of Special Strength-Training in Sport, further influenced Western methods by detailing the shock method—briefly referencing its Soviet origins—and providing structured protocols that bridged Eastern innovations with accessible coaching practices. By the and , plyometrics entered mainstream fitness and sports conditioning, becoming a staple in (HIIT) protocols and emerging modalities like , which launched in 2000 and incorporated explosive jumps and bounds to enhance metabolic and power outputs. Its inclusion in programs grew, emphasizing safe progression to build athleticism without excessive risk. The National Strength and Conditioning Association (NSCA) formalized plyometrics within guidelines during this era, recommending its use in periodized programs to complement resistance exercises and improve speed and power, as outlined in their foundational texts on conditioning. In the , plyometrics evolved with technological advancements, including digital tracking apps that monitor jump metrics, , and recovery to optimize training loads. models integrated plyometrics more systematically, aligning explosive sessions with sport-specific demands to prevent . Applications remain focused on physical domains, with ongoing integration into various training protocols. Globally, plyometrics influenced soccer through FIFA's 11+ program, launched in the early , which incorporates plyometric elements like and balance drills to enhance neuromuscular control and reduce lower-limb injuries in players. In Asian , such as and , it has been adapted since the to boost explosive kicks and reactive agility, with studies confirming improvements in power and speed for practitioners.

Physiological Mechanisms

Stretch-Shortening Cycle

The stretch-shortening cycle (SSC) is defined as a coordinated sequence of muscle actions involving an eccentric contraction, where the muscle lengthens under tension; a brief amortization phase as a transition; and a subsequent concentric contraction, where the muscle shortens, enabling the storage and immediate release of to enhance performance. This cycle underlies explosive movements in plyometrics by coupling rapid lengthening and shortening to amplify mechanical output beyond isolated concentric actions. The primary mechanism of the SSC relies on series elastic components, particularly tendons, which act like springs to store elastic potential energy during the eccentric phase and release it through in the concentric phase, thereby increasing overall force and efficiency. Muscle spindles play a key role by detecting the rapid stretch and triggering a , which enhances neural activation and facilitates quicker force production during the transition to shortening. These interactions minimize energy loss and maximize the potentiation effect, distinguishing the SSC from pure concentric efforts. The eccentric phase involves the muscle-tendon unit absorbing external loads, such as impact forces during from a jump, while storing and preparing for . The amortization phase follows immediately, representing a critically short transition period where ground contact time is minimized—typically under 0.2 seconds—to prevent of stored energy and maintain the reactive between phases. In the concentric phase, the muscle explosively shortens, propelled by the combined contractile force and to generate maximal , as seen in the upward drive of a jump. Power output in the SSC is fundamentally expressed as P=F×vP = F \times v, where PP is power, FF is , and vv is ; the eccentric pre-stretch elevates the baseline FF from elastic storage and augments concentric vv through superimposed , yielding higher peak power than non-SSC contractions. To derive this enhancement, consider that during the eccentric phase, work done Wecc=∫Fecc dlW_{ecc} = \int F_{ecc} \, dl stores energy in tendons, which is released additively in the concentric phase such that effective Feff=Fcontractile+FelasticF_{eff} = F_{contractile} + F_{elastic}, and vconv_{con} increases due to the elastic component's contribution, resulting in PSSC>PconP_{SSC} > P_{con} where Pcon=Fcontractile×vcontractileP_{con} = F_{contractile} \times v_{contractile}. This amplification is most pronounced in fast SSC actions with brief amortization. Training implications for enhancing the SSC and elastic recoil, particularly in sports like boxing, involve incorporating plyometric rotational exercises such as medicine ball slams and banded twists to develop explosive power. These exercises emphasize rapid countermovements to optimize the amortization phase. Drills targeting pelvic-thoracic separation and proximal-to-distal sequencing are essential for efficient energy transfer through the kinetic chain. Poor timing, such as a prolonged amortization phase, can reduce the elastic energy contribution, resulting in diminished power output and increased injury risk due to improper force absorption.

Neural and Muscular Adaptations

Plyometric training elicits significant neural adaptations that improve and firing rates, enhancing the nervous system's ability to activate muscle fibers more efficiently during movements. These changes also promote better intermuscular coordination, allowing synergistic muscles to work in greater harmony for rapid force production. Additionally, sensitivity is heightened through modulation of spinal es, involving Ia afferents from muscle spindles that facilitate the and Golgi tendon organs (Ib afferents) that help regulate tension and prevent overload during high-impact activities. (EMG) studies show increased neural drive, with elevated muscle activation levels observed post-training, supporting these enhancements. On the muscular level, plyometric training preferentially recruits and adapts fast-twitch fibers, particularly type IIx fibers, leading to selective hypertrophy that boosts explosive power output. This fiber-specific growth improves the muscle's capacity for rapid contraction and relaxation. These muscular changes complement the neural improvements, contributing to overall power development. The timeline of adaptations begins acutely with post-session potentiation, where immediate increases in muscle force occur due to enhanced calcium sensitivity and neural excitation following a single bout. Chronically, over 4-8 weeks of consistent training, individuals typically experience 4-8% gains in power metrics such as vertical jump height, driven by combined neural and muscular remodeling. A 2023 umbrella review of meta-analyses confirmed these outcomes, highlighting neural drive improvements in sprint and jump performance across diverse populations. These adaptations are primarily triggered by the stretch-shortening cycle inherent in plyometric exercises.

Training Methods

Basic Principles

Plyometric training is grounded in the principle of maximizing movement speed while minimizing ground contact time to exploit the stretch-shortening cycle (SSC), where muscles rapidly transition from eccentric to concentric contraction for explosive power output. In applications such as boxing, this involves performing plyometric rotational exercises like medicine ball slams and banded twists to enhance elastic recoil, with a focus on rapid countermovements and drills emphasizing pelvic-thoracic separation and proximal-to-distal sequencing for optimal power transfer. Poor timing in the amortization phase of the SSC can reduce elastic energy contribution, leading to diminished power output and increased injury risk. This approach emphasizes quality over quantity, with beginners typically limited to 80-100 foot contacts per session to ensure proper form and reduce injury risk. Overemphasis on volume can compromise technique and effectiveness, so sessions prioritize explosive intent with full recovery between repetitions, often using a work-to-rest of 1:5 to 1:10. Fundamental technique in plyometric exercises involves triple extension of the ankle, , and during the propulsion phase of jumps to generate maximal . Landings must be active, with knees and hips flexed to eccentrically absorb impact forces while maintaining alignment to prepare for immediate re-explosion, preventing passive or stiff drops that increase stress. Proper execution requires athletes to focus on rapid, controlled movements rather than or alone, ensuring the SSC is fully engaged. Sessions begin with a general warm-up followed by dynamic stretches and low-intensity specific movements to prepare the neuromuscular system, such as light jogging or marching in place. Plyometrics are often integrated after resistance training to build on strength gains while fatigued, enhancing power transfer, though beginners should prioritize fresh-state execution if needed. A cool-down with static aids recovery, and training frequency is 2-3 sessions per week for novices, allowing at least 48 hours between bouts for adaptation and repair.

Programming and Progression

Plyometric programming involves systematic structuring of sessions to optimize power development while minimizing risk, with progression tailored to the individual's experience level. Programs typically measure volume in terms of foot contacts—the number of times the feet touch the ground during exercises—and intensity based on factors such as jump height, speed, and complexity. According to National Strength and Conditioning Association (NSCA) guidelines, beginners should start with 80-100 foot contacts per session, focusing on low-intensity, bilateral exercises like squat jumps to establish neuromuscular coordination and tolerance. Intermediate trainees progress to 100-120 contacts, incorporating moderate intensity through added drop heights or bounds to enhance reactive strength. Advanced athletes handle 120 or more contacts, integrating complex, high-intensity drills such as depth jumps or single-leg variations to maximize explosive power. Periodization ensures balanced progression by organizing into cycles that manipulate and intensity. Linear periodization builds intensity gradually over weeks, starting with higher and lower intensity in early mesocycles before peaking with high-intensity, low- sessions in later phases. Undulating periodization varies these variables daily or weekly within a microcycle, allowing for frequent exposure to different stimuli to prevent plateaus and accommodate recovery. Plyometrics are commonly integrated into macrocycles during off-season power development phases, comprising 10-20% of total alongside resistance exercises, with sessions limited to 2-3 times per week and at least 48 hours of recovery between them. Progression is guided by key performance metrics to ensure adaptations occur without . Reductions in ground contact time during jumps indicate improved stretch-shortening cycle efficiency, while increases in height serve as a reliable benchmark for overall power gains, typically targeted at 5-10% improvement over 4-8 weeks. These metrics help coaches adjust volume by 10-20% or intensity through incremental height additions when plateaus are reached. A sample 4-week beginner-to-intermediate program outline, following NSCA recommendations, might structure sessions as follows: Week 1 emphasizes low intensity with 3 sets of 5-6 reps per exercise (e.g., total 80-100 contacts), 5-10 seconds between reps, and 1-2 minutes between sets; Weeks 2-3 increase to 6-8 reps (100-120 contacts) with moderate drop heights; Week 4 incorporates advanced elements like bounds for 8 reps (120 contacts), maintaining 5-10 seconds intra-set and 2-3 minutes inter-set. This cycle repeats or advances based on metric improvements, always prioritizing full recovery.

Types of Exercises

Bodyweight Plyometrics

Bodyweight plyometrics encompass a range of accessible exercises that utilize only the performer's mass to foster explosive power, making them foundational for introducing the stretch-shortening cycle in . These movements emphasize quick, reactive jumps and are ideal for due to their low equipment requirements and scalability, often serving as warm-up activities to enhance neuromuscular activation before more demanding sessions. Key exercises include squat jumps, tuck jumps, bounding in place, skater jumps, and depth jumps, which build vertical and lateral power through controlled explosive actions. Proper technique in these exercises aligns with basic plyometric principles, focusing on rapid eccentric loading followed by concentric explosion and soft landings to protect joints. The squat jump begins with feet positioned at shoulder width, descending into a squat (approximately 90 degrees of knee flexion) while keeping the torso upright, then explosively extending the hips, , and ankles to propel upward, driving the arms overhead for added momentum, and landing softly on the balls of the feet with bent to absorb force. In the tuck jump, start from a standing position with a slight bend, perform a quick downward countermovement, then jump maximally while drawing the toward the chest at peak height, landing on the forefoot with hips back and flexed to immediately transition into the next repetition. Bounding in place involves repeated vertical leaps from a semi-crouched stance, emphasizing minimal ground contact time (less than 0.25 seconds) by driving through the toes with each upward propulsion, simulating forward bounding but confined to a stationary position for controlled power output. Skater jumps target lateral power by jumping side-to-side from a narrow stance, extending one leg outward while swinging the opposite arm across the body for balance and drive, landing balanced on the outer foot with a slight bend before exploding to the opposite side. Depth jumps, also known as plyometric box or depth jumps, are performed by stepping off a box or platform (typically 30-75 cm in height, depending on the athlete's strength level) and immediately upon landing, explosively jumping vertically as high as possible while minimizing ground contact time (less than 0.2 seconds). Variations include jumping horizontally for distance, which simulates sprinting mechanics, or rebounding onto a higher box to further challenge reactive strength. This high-intensity stretch-shortening cycle (SSC) training maximizes elastic energy storage in the legs, core, and fascial tissues for explosive push-off, particularly beneficial for fascial training in sprinting by enhancing tendon and myofascial elasticity. This exercise enhances reactive strength and elasticity through the stretch-shortening cycle, strongly activates fast-twitch muscles via heightened central nervous system stimulation and myotatic reflex, and is recognized as one of the most effective plyometric exercises for improving vertical jump performance via shock training methods. For programming, 3–5 sets of 5–8 repetitions are recommended, with full recovery between efforts to maintain quality. As a variation to introduce unilateral demands without external loading, single-leg can be performed by hopping repeatedly on one foot in place, focusing on controlled takeoffs and landings to build stability and introductory single-limb explosiveness. For beginners, these bodyweight exercises are recommended at a volume of 3-5 sets of 6-10 repetitions per exercise, with full recovery (1-2 minutes) between sets to ensure high-quality execution and minimize fatigue-related form breakdown.

Loaded and Unilateral Variations

Loaded plyometric exercises incorporate external resistance to enhance power output beyond bodyweight , which serves as foundational preparation for these advanced variations. Common examples include medicine ball slams, where an athlete explosively drives a overhead and slams it downward using full-body extension, and weighted vest jumps, which add controlled load to vertical or horizontal leaps to increase force production. Depth jumps with dumbbells involve stepping off a box, absorbing the landing, and immediately exploding upward while holding light dumbbells for added resistance. Execution of loaded exercises emphasizes the stretch-shortening cycle while prioritizing safety and form. In a throw, the athlete performs an explosive overhead toss following a controlled eccentric catch to load the muscles, ensuring rapid reversal from deceleration to for optimal power transfer. Controlled deceleration during the phase is critical across all loaded variations to protect joints and maximize utilization. Unilateral plyometric variations focus on single-limb actions to develop independent leg power and address movement imbalances. Examples include single-leg box jumps, where the athlete leaps onto and off a box using one leg to build explosive strength, and , involving a single-leg squat followed by a vertical hop to enhance balance and unilateral force. These exercises are particularly beneficial for correcting in unilateral-dominant sports like , where side-to-side imbalances can impair performance and increase risk by promoting equal development in both limbs. Loaded and unilateral variations are typically integrated into advanced training phases after proficiency in bodyweight plyometrics is achieved, with sessions limited to 1-2 times per week to allow recovery and prevent overload.

Benefits and Applications

Performance Enhancements

Plyometric training has been shown to yield notable improvements in key athletic performance metrics, including vertical jump height, sprint speed, and agility, with meta-analyses reporting average gains of 5-15% across various populations. For instance, a 2023 systematic review and meta-analysis on plyometric jump training demonstrated moderate effect sizes (ES = 0.38-0.62) for enhancements in linear sprinting and change-of-direction speed, translating to practical improvements in explosive actions. These gains are attributed in part to neural adaptations that enhance the rate of force development during rapid movements. In sports-specific contexts, plyometrics significantly boosts capabilities relevant to , track, and soccer. In , it improves rebounding power by increasing performance, as evidenced by a 2024 meta-analysis showing moderate enhancements in jumping ability among youth players (SMD = 0.68). Among plyometric exercises, depth jumps and box jumps are particularly effective for enhancing vertical jump performance and sprinting capabilities; they improve reactive strength and elasticity through the stretch-shortening cycle, including fascial adaptations that maximize elastic energy storage in legs and core for explosive push-off, strongly activate fast-twitch muscle fibers, and represent one of the most effective methods via shock training approaches, with studies reporting improvements in vertical jump height ranging from 4.7% to 12% and up to 3-5% reductions in 10-20m sprint times. In soccer, it supports cutting maneuvers and , with a indicating improved change-of-direction performance in adolescent players (SMD = 0.76). Meta-analyses indicate that plyometric training significantly improves sprint speed in adolescents and youth. In adolescent soccer players (aged 10-18.99 years), it yields a small but significant effect on sprint performance across distances (SMD = -0.45, 95% CI [-0.57, -0.32], p < 0.001). In youth basketball players (aged 5-17.99 years), it enhances linear sprinting (SMD = 0.59, 95% CI [0.25, 0.94], p < 0.001), with stronger effects in younger subgroups (up to 14.99 years) and specific protocols. In boxing, plyometric training enhances explosive punch power by improving the stretch-shortening cycle (SSC) and elastic recoil, particularly through rotational exercises such as medicine ball slams and banded twists. These drills emphasize rapid countermovements, pelvic-thoracic separation, and proximal-to-distal sequencing to optimize power transfer in punches. However, poor timing in the amortization phase can reduce elastic energy contribution, leading to lower power output and increased injury risk. A 2021 study on intermittent plyometric training in athletes reported improvements in maximal aerobic speed (a proxy for ) of approximately 8% and enhanced anaerobic capacity, including better repeated sprint ability. However, a 2025 found only small, non-significant effects on (SMD = -0.11, p = 0.49) in recreational runners, suggesting benefits may be more pronounced in athletic populations for intermittent high-intensity demands. Compared to traditional , plyometrics demonstrates superiority in developing rate of force development, a critical factor for sports performance. A 2017 meta-analysis revealed that power-oriented plyometric programs produced larger effect sizes (ES = 0.6-1.2) in jump height and power than conventional resistance training (ES = 0.3-0.7), particularly for rapid force production. This edge stems from plyometrics' emphasis on stretch-shortening cycle efficiency, leading to more transferable gains in dynamic athletic tasks.

Health and Rehabilitation Benefits

Plyometric training offers significant health benefits, particularly in promoting bone health among vulnerable populations. In postmenopausal women, who are at higher risk for osteoporosis, regular plyometric exercises such as jumping have been shown to increase bone mineral density by approximately 2-3% in the hip and spine regions over extended programs, helping to mitigate age-related bone loss. This effect stems from the high-impact nature of plyometrics, which stimulates osteogenesis through mechanical loading on the skeletal system. Beyond bone density, plyometrics enhance proprioception—the body's sense of position and movement—which contributes to reduced injury risk by improving neuromuscular control and joint stability during dynamic activities. In rehabilitation settings, plyometrics play a key role in restoring functional power after injuries like (ACL) reconstruction. Progressive plyometric protocols, introduced in later stages of recovery, help rebuild explosive strength and coordination, enabling patients to regain pre-injury levels of lower limb power and reduce re-injury likelihood. For older adults, low-intensity plyometric variations are adapted for programs, where exercises like controlled step-ups improve balance, reaction time, and lower-body power, thereby decreasing the incidence of falls in clinical and community-based interventions. These adaptations ensure accessibility while targeting age-specific declines in muscle power. In youth populations, recent 2025 research also reveals cognitive benefits, including boosted mental well-being and focus, as plyometric training in structured programs like youth soccer enhances alongside physical gains. These findings highlight plyometrics' versatility in clinical settings for diverse groups, from geriatric care to pediatric wellness initiatives.

Safety Considerations

Risks and Contraindications

Plyometric training involves high-impact, explosive movements that place significant eccentric loading on the musculoskeletal system, potentially leading to joint stress injuries such as patellar tendonitis and (ACL) strains, particularly in the knees and ankles. Overuse injuries, including (medial tibial stress syndrome) and stress fractures, are also common due to the repetitive nature of jumping and landing, with higher incidence observed in untrained individuals engaging in high-volume sessions without proper progression. Although overall injury rates from plyometrics are considered low when appropriately programmed, reports indicate that plyometric training, when properly implemented, can reduce overall rates from baseline levels of around 18% to 8%, as shown in studies on players. Absolute contraindications for plyometric training include acute or sub-acute injuries such as sprains, strains, , or in the lower extremities, as these conditions exacerbate tissue damage under high-impact forces. Joint instability, immediate postoperative status, and gross unconditioning also preclude participation, as they increase the likelihood of further trauma. Severe or high fracture risk represents a key due to the elevated risk from high-impact activities; however, low-intensity plyometrics may benefit in at-risk older adults under supervision. High-impact plyometric exercises are generally not recommended beyond the first trimester of unless medically cleared, owing to potential risks to maternal joints and fetal stability from sudden, forceful movements. Poor mechanics, often stemming from inadequate neuromuscular control, further heighten susceptibility and warrant avoidance or modification. Several factors amplify the risks associated with plyometrics, including inadequate warm-up, which fails to prepare muscles and joints for eccentric demands, thereby elevating strain on tendons and ligaments. Excessive volume, such as exceeding 150 ground contacts per session, promotes and overuse, particularly in lacking foundational strength. Performing exercises on hard, unyielding surfaces intensifies impact forces, contributing to higher rates of lower limb injuries compared to softer terrains. Studies indicate that without gradual progression, may face elevated risk of and overuse injuries like medial tibial stress syndrome, underscoring the need for controlled introduction to mitigate overuse.

Implementation Guidelines

Before initiating plyometric training, practitioners should conduct thorough screening to ensure participant readiness and minimize injury risk. A key assessment involves evaluating lower-body strength, particularly the ability to perform a back squat at 1.5 times body weight, as this threshold indicates sufficient eccentric control for handling the high-impact demands of plyometrics. Ankle mobility should also be assessed through tests like the weight-bearing lunge test, aiming for at least 10-15 degrees of dorsiflexion to support proper landing mechanics and reduce stress on the and . Additionally, the Functional Movement Screen (FMS) is recommended to identify movement asymmetries or limitations, with scores below 14 signaling the need for corrective exercises before progressing to plyometrics. Practical guidelines emphasize starting plyometric sessions on forgiving surfaces such as grass or padded mats to absorb impact and protect joints during initial adaptations. Volume should be balanced with foundational strength training, maintaining a ratio where strength work constitutes approximately three times the volume of plyometric contacts (e.g., 60 strength reps paired with 20 plyometric foot contacts per session) to build resilience without overload. Fatigue monitoring via heart rate variability (HRV) is essential, with practitioners tracking morning supine HRV metrics; a decrease of more than 5-10% from baseline indicates accumulated fatigue, warranting reduced volume or added recovery. For novices, modifications include reducing intensity by using low-height drops (under 12 inches) and limiting sessions to 50-80 total foot contacts, gradually increasing over 4-6 weeks to allow neuromuscular . In rehabilitation settings, by certified trainers or physical therapists is critical, with plyometrics introduced only after achieving 85-90% in strength and incorporating assistive tools like resistance bands for controlled landings. Incorporating recovery modalities like (1-2 sessions weekly) after plyometric training can enhance flexibility, reduce soreness, and improve adherence, as suggested in general exercise recovery guidelines.

References

  1. https://www.sciencedirect.com/topics/nursing-and-health-professions/plyometrics
  2. https://www.health.harvard.edu/exercise-and-fitness/try-this-get-jumping-with-plyometrics
  3. https://pmc.ncbi.nlm.nih.gov/articles/PMC9832201/
  4. https://www.webmd.com/fitness-exercise/what-is-plyometrics
  5. https://pmc.ncbi.nlm.nih.gov/articles/PMC4637913/
  6. https://www.scienceforsport.com/plyometric-training-2/
  7. https://www.nature.com/articles/s41598-025-10652-4
  8. https://www.henryford.com/Blog/2025/10/Amp-Workouts-Plyometrics
  9. https://www.merriam-webster.com/wordplay/origin-of-exercise-words
  10. https://www.scienceforsport.com/ballistic-training/
  11. https://pubmed.ncbi.nlm.nih.gov/16194980/
  12. http://ancientolympics.arts.kuleuven.be/eng/TC021EN.html
  13. https://www.olympics.com/ioc/ancient-olympic-games/the-sports-events
  14. https://www.researchgate.net/publication/387024146_History_of_the_plyometric_training_a_review_in_sport
  15. https://www.verkhoshansky.com/
  16. https://www.verkhoshansky.com/Portals/0/Presentations/Shock%2520Method%2520Plyometrics.pdf
  17. http://office.biggerfasterstronger.com/uploads2/09_MayJun_PositionPaperPlyometrics.pdf
  18. https://www.freelapusa.com/the-history-of-plyometrics/
  19. https://www.fireengineering.com/fire-safety/plyometrics-for-emergency-services/
  20. https://www.researchgate.net/publication/322040348_Plyometric_and_Speed_Training
  21. https://www.zoarfitness.com/post/programming-plyos/
  22. https://www.nsca.com/education/articles/kinetic-select/plyometric-training/
  23. https://play.google.com/store/apps/details?id=com.fitivity.plyometrics&hl=en_US
  24. https://bmcsportsscimedrehabil.biomedcentral.com/articles/10.1186/s13102-017-0083-z
  25. https://bmcsportsscimedrehabil.biomedcentral.com/articles/10.1186/s13102-025-01059-9
  26. https://pmc.ncbi.nlm.nih.gov/articles/PMC4463830/
  27. https://pmc.ncbi.nlm.nih.gov/articles/PMC6438856/
  28. https://journals.lww.com/acsm-essr/fulltext/2012/04000/how_neurons_make_us_jump__the_neural_control_of.9.aspx
  29. https://www.sciencedirect.com/science/article/abs/pii/S0021929000000646
  30. https://www.researchgate.net/publication/232163543_The_Stretch-Shortening_Cycle_Proposed_Mechanisms_and_Methods_for_Enhancement
  31. https://core.ac.uk/download/pdf/15476485.pdf
  32. https://boxingscience.co.uk/plyometrics-for-boxing-2/
  33. https://pmc.ncbi.nlm.nih.gov/articles/PMC7739747/
  34. https://pmc.ncbi.nlm.nih.gov/articles/PMC164383/
  35. https://www.researchgate.net/publication/223128796_Does_plyometric_training_improve_strength_performance_A_meta-analysis
  36. https://pmc.ncbi.nlm.nih.gov/articles/PMC5260592/
  37. https://pmc.ncbi.nlm.nih.gov/articles/PMC385258/
  38. https://www.researchgate.net/publication/251713951_The_effect_of_a_4_week_plyometric_training_period_on_lower_body_muscle_EMG_changes_in_futsal_players
  39. https://www.mdpi.com/2075-4663/9/9/127
  40. https://journals.lww.com/nsca-scj/fulltext/2016/02000/effects_of_plyometric_training_on_sports.5.aspx
  41. https://pmc.ncbi.nlm.nih.gov/articles/PMC2465309/
  42. https://pmc.ncbi.nlm.nih.gov/articles/PMC9798280/
  43. https://www.hprc-online.org/physical-fitness/training-performance/use-plyometrics-improve-muscular-power-and-military-fitness
  44. https://www.nsca.com/contentassets/de9aebfe7a7340b69217b99bb13862a7/basics_of_strength_and_conditioning_manual.pdf
  45. https://www.nsca.com/education/articles/kinetic-select/plyometric-exercises/
  46. https://www.nsca.com/contentassets/53f36e5db26a4729b251fb794c166af1/tsac-module-4.0--4.5.pdf
  47. https://journals.lww.com/nsca-scj/fulltext/2011/02000/the_science_and_practice_of_periodization__a_brief.6.aspx
  48. https://www.verywellfit.com/lateral-plyometric-jumps-dynamic-power-balance-3119999
  49. https://fasciatrainingapplication.com/application/v/depth-jump
  50. https://www.freelapusa.com/depth-jumps-and-speed/
  51. https://simplifaster.com/articles/deconstructing-reconstructing-depth-jump-speed-power-performance/
  52. https://pmc.ncbi.nlm.nih.gov/articles/PMC4168734/
  53. https://breakingmuscle.com/verkhoshanskys-depth-jumps-create-gains-in-max-strength/
  54. https://www.ptpioneer.com/personal-training/certifications/nsca-cscs/cscs-chapter-18/
  55. https://quizlet.com/144440795/chapter-17-20-nsca-essentials-of-personal-training-flash-cards/
  56. https://www.nsca.com/education/articles/nsca-coach/beyond-the-pool-improving-swimming-performance-with-dryland-training/
  57. https://journals.lww.com/nsca-jscr/fulltext/2015/05000/effect_of_unilateral%2C_bilateral%2C_and_combined.22.aspx
  58. https://pmc.ncbi.nlm.nih.gov/articles/PMC10457889/
  59. https://traineracademy.org/cpt-textbook/principles-of-plyometric-training/
  60. https://sportsmedicine-open.springeropen.com/articles/10.1186/s40798-023-00568-6
  61. https://www.frontiersin.org/journals/physiology/articles/10.3389/fphys.2017.00423/full
  62. https://www.frontiersin.org/journals/physiology/articles/10.3389/fphys.2024.1427291/full
  63. https://pubmed.ncbi.nlm.nih.gov/34536969/
  64. https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0319548
  65. https://boxingscience.co.uk/power-for-boxing-power-circuits-plyometrics/
  66. https://www.researchgate.net/publication/353391927_The_effect_of_intermittent_training_with_plyometric_exercises_on_aerobic_and_anaerobic_capacities
  67. https://www.researchgate.net/publication/396083936_Effects_of_Plyometric-Based_Training_on_Cardiorespiratory_Fitness_Running_Economy_and_Functional_Performance_in_Recreational_Runners_A_Systematic_Review_and_Meta-Analysis
  68. https://link.springer.com/article/10.1007/s11914-025-00912-7
  69. https://pmc.ncbi.nlm.nih.gov/articles/PMC6349785/
  70. https://pmc.ncbi.nlm.nih.gov/articles/PMC8169025/
  71. https://pmc.ncbi.nlm.nih.gov/articles/PMC7447006/
  72. https://pubmed.ncbi.nlm.nih.gov/41047852/
  73. https://www.sciencedirect.com/science/article/pii/S2095254620300764
  74. https://www.mdpi.com/2076-3417/15/10/5356
  75. https://www.sciencedirect.com/topics/immunology-and-microbiology/plyometrics
  76. https://www.acog.org/clinical/clinical-guidance/committee-opinion/articles/2020/04/physical-activity-and-exercise-during-pregnancy-and-the-postpartum-period
  77. https://www.physio-pedia.com/Plyometrics
  78. https://strengthandconditioningeducation.com/wp-content/uploads/2023/03/L4-manual-v3-2023.pdf
  79. https://squatuniversity.com/2015/11/05/the-squat-fix-ankle-mobility-pt-1/
  80. https://www.frontiersin.org/journals/physiology/articles/10.3389/fphys.2022.941675/full
  81. https://pmc.ncbi.nlm.nih.gov/articles/PMC4652221/
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