A relaxation technique (also known as relaxation training) is any method, process, procedure, or activity that helps a person to relax; attain a state of increased calmness; or otherwise reduce levels of pain, anxiety, stress or anger. Relaxation techniques are often employed as one element of a wider stress management program and can decrease muscle tension, lower blood pressure, and slow heart and breath rates, among other health benefits.

Relaxation therapy, the application of relaxation techniques, can be applied in various settings to complement treatment for stress, anxiety, depression, and pain. It addresses both psychological and physiological effects of stress such as increased heart rate, sweating, and muscle tension. There are many variations of relaxation techniques, including progressive muscle relaxation, autogenic training, guided imagery, biofeedback-assisted relaxation, and other techniques.

Thus, relaxation techniques are useful for either emotional pain caused by stress, anger, anxiety, and mood of depression, or chronic pain caused by strains, single-side muscle use, awkward position, restriction of movement in certain areas of the spine, improper form during physical activity, and stressful posture. Multiple relaxation techniques share a fundamental principle to decrease muscle tension and lower physical or mental pain.

Relaxation techniques are generally safe for healthy individuals. Occasional instances exist where individuals have reported negative experiences after receiving relaxation techniques.

Current and past researchers have explored the relationship between physical and mental disorders through various methods and investigated the effects of relaxation techniques. The subsequent literature review presents a brief and succinct overview of the latest research discoveries, providing a background for the understanding of relaxation techniques.

Claude Bernard, a scientist in 1865, observed that maintaining a constant internal environment, our internal milieu, when facing changes in external environment and conditions is critical for life and well-being.

Additionally, chronic stressors can have negative consequences, and they are especially prevalent in humans, potentially due to their high cognitive ability, which may cause ongoing stress responses to various adverse life and work circumstances. The connection between psychosocial stressors and chronic illness is intricate and influenced by various factors, such as the type, quantity, and duration of stressors, along with an individual's biological susceptibility (like genetics and inherent characteristics) and their learned ways of coping.

Previous studies have indicated that relaxation techniques, including but not limited to deep breathing, guided imagery, meditation, and progressive muscle relaxation, are effective ways to reduce stress, indicating that relaxation techniques are effective in promoting relaxation both physically and psychologically.