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Olympic-size swimming pool
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An Olympic-size swimming pool is a swimming pool which conforms to the regulations for length, breadth, and depth made by World Aquatics (formerly FINA) for swimming at the Summer Olympics and the swimming events at the World Aquatics Championships. Different size regulations apply for other pool-based events, such as diving, synchronized swimming, and water polo. Less onerous breadth and depth regulations exist for lesser swimming competitions, but any "long course" event requires a course length of 50 metres (164 ft 0.5 in), as distinct from "short course" which applies to competitions in pools that are 25 metres (82 ft 0 in) in length (or 75 feet (22.9 m) in the United States). If touch pads are used in competition, then the distance is relative to the touch pads at either end of the course, so that the pool itself is generally oversized to allow for the width of the pads.
An Olympic-size swimming pool is used as a colloquial unit of volume, to make approximate comparisons to similarly sized objects or volumes. It is not a specific definition, as there is no maximum limit on the depth of an Olympic pool. The value has an order of magnitude of 1 megaliter (ML).[1] Some style guides caution against the hyperbole of describing any relatively large pool as "Olympic-size[d]".[2]
Specifications
[edit]
World Aquatics specifications for an Olympic-size pool are as follows:
| Physical property | Specified value |
|---|---|
| Length | 50 m (164 ft 1 in)[3] |
| Width | 25 m (82 ft 0 in)[3] |
| Depth | 2 m (6 ft 7 in) minimum, 3 m (9 ft 10 in) recommended when using the pool for multi discipline.[3] |
| Number of lanes | 10 |
| Lane width | 2.5 m (8 ft 2 in) |
| Water temperature | 25–28 °C (77–82 °F) |
| Light intensity | minimum 1500 lux (140 footcandles) |
| Volume | 2,500,000 L (2,500 m3; 660,000 US gal), assuming a nominal depth of 2 m. About 2 acre-feet. |
There must be two spaces 2.5 m (8 ft 2 in) wide outside lanes 1 and 8 (in effect, two empty lanes).[3] The length of 50 metres (164 ft) must be between the touch pads at the end of each lane, if they are used.[3] If starting blocks are used, then there must be a minimum depth of 1.35 metres (4.4 ft) from between 1 metre (3 ft 3 in) from the end of the pool to at least 6 metres (19 ft 8 in) from the end of the pool. At all other points, the minimum depth is 1 metre (3 ft 3 in).[3] If the pool is used for Olympic Games or World Championships, then the minimum depth is increased to 2 metres (6 ft 7 in).[3] Whereas the Water Cube pool used for the 2008 Olympics was 3 metres (9 ft 10 in) deep, the temporary pool used in 2024 was only 2.2 metres (7 ft 3 in), which commentators suggested made for slower race times.[4]
Ten-lane pools
[edit]At FINA's 2009 Congress, rules were approved for 10-lane courses for competition, as an alternative to the more traditional 8-lane course.
This version of the Olympic-sized swimming pool debuted in the 2008 Beijing Summer Olympics. Beforehand, the Summer Olympics featured the more traditional 8-lane course with a depth of roughly seven feet,[5] now the minimum depth requirement. Twenty-five world records were broken at this pool, although this is more heavily attributed to the polyurethane "supersuits" worn by many competitors (banned by FINA in 2010).
The new Olympic-sized swimming pool was designed to provide advantages to competitors. Increasing the lane count from eight to ten introduces a "buffer lane", helping to absorb waves generated by movements of the swimmers.[5] The increased depth of the pool assists the lane lines in dissipating water churn, thereby creating less hydrodynamic drag.[5]
See also
[edit]References
[edit]- ^ "SI Units – Volume". NIST. 1 August 2011.
- ^
- Bryson, Bill (30 June 2012). "Olympic-sized swimming pool". Bryson's Dictionary: for Writers and Editors. Transworld. ISBN 978-1-4070-9439-7.
Almost no-one owns a private pool that large, so the description in respect to private pools is almost always a gross exaggeration.
- Martin, Paul (15 June 2010). "Olympic-size swimming pool". The Wall Street Journal Guide to Business Style and Usage. Simon and Schuster. ISBN 978-1-4391-2269-3.
- Bryson, Bill (30 June 2012). "Olympic-sized swimming pool". Bryson's Dictionary: for Writers and Editors. Transworld. ISBN 978-1-4070-9439-7.
- ^ a b c d e f g "Fina Facilities Rules 2021-2025" (PDF). FINA. Archived from the original (PDF) on 10 August 2024. Retrieved 12 August 2024.
- ^
- Aldridge, David (30 July 2024). "Is Olympic pool's depth hurting swimmers? As world records hold, mystery rolls on". The Athletic. The New York Times. Retrieved 1 August 2024.
- Keating, Shane (1 August 2024). "The Conversation: Just one swimming world record has fallen at the Paris Olympics. Is the pool to blame?". The Guardian. Retrieved 1 August 2024.
- ^ a b c "China's Olympic Swimming Pool: Redefining Fast". NPR. Retrieved 3 March 2019.
Olympic-size swimming pool
View on GrokipediaDefinition and Standards
Definition
An Olympic-size swimming pool is defined as a swimming facility that conforms to the specific regulations established by World Aquatics (formerly FINA) for hosting international competitive swimming events, particularly those conducted in long-course meters (LCM), where the pool length measures precisely 50 meters to accommodate elite-level races.[1] These standards, outlined in World Aquatics' Facilities Rules (FR 2.2.1), ensure that pools used for events like the Olympic Games and most World Championships provide a uniform racing environment.[1] The primary role of an Olympic-size pool is to create equitable and standardized conditions for competitive swimming, minimizing variables that could influence performance and allowing athletes to focus on technique, speed, and endurance under optimal safety parameters.[1] By adhering to these guidelines, such pools facilitate fair comparisons across global competitions, as variations in pool design could otherwise alter race outcomes through differences in water flow, turning efficiency, or propulsion opportunities. This standardization is essential for maintaining the integrity of records and rankings in professional swimming.[1] In contrast to short-course pools, which measure 25 meters and are used for specific World Aquatics championships, Olympic-size pools demand greater emphasis on sustained straight-line swimming over longer distances per length, resulting in higher stroke counts per segment and reduced reliance on turns for momentum.[1] This difference impacts race times, with elite swimmers typically achieving approximately 2% faster performances in short-course events due to the increased number of push-offs and glides from more frequent turns, which provide additional acceleration not as prevalent in the longer lengths of Olympic pools.[5] The term "Olympic-size" derives from the pools' mandatory use in the Summer Olympic Games since their standardization for international events, though a common misconception is that any 50-meter pool qualifies as Olympic-size; in reality, full certification requires compliance with all World Aquatics criteria beyond length alone.[1]Governing Standards
World Aquatics, formerly known as FINA, serves as the primary international governing body for aquatic sports, including swimming, and establishes the standards for Olympic-size swimming pools through its Facility Rules (FR) outlined in the official rulebook.[1] These rules ensure uniformity and fairness in competitions by specifying requirements for pool construction, dimensions, and operational conditions, with compliance mandatory for events like the Olympic Games and World Championships.[6] The certification process for Olympic-size pools involves rigorous inspections conducted by surveyors or technicians appointed and approved by World Aquatics or the relevant national federation.[6] Applicants must submit scaled architectural drawings of the pool's plan and section views, along with a calibration certificate for measurement equipment valid for one year, and undergo on-site verification using precise tools like total stations with accuracy to 1 mm + 1.5 ppm.[6] Upon approval, a certification document is issued with a maximum validity of one year, requiring renewal for ongoing use in record-eligible competitions or if structural changes occur.[6] For competition eligibility, World Aquatics mandates strict tolerances, such as a course length of 50.000 m with a tolerance of +0.010 m / -0.000 m between touch panels for 50 m pools, and wall-to-wall measurements of 50.020 m to 50.030 m to account for lane rope attachments.[1] Environmental factors are also regulated, including water temperature maintained between 25°C and 28°C to optimize performance and safety, alongside requirements for minimal water turbulence verified by a floating ball test and salt content below 3 g/L for world record validation.[1] While World Aquatics sets global benchmarks, national bodies like USA Swimming adopt these standards for international alignment but may incorporate additional local requirements, such as specific safety protocols under U.S. health codes.[7] Harmonization efforts ensure that national certifications, often handled by member federations, directly support World Aquatics compliance, allowing pools certified locally to qualify for major events without redundant international re-inspections.[7]Physical Specifications
Dimensions and Layout
An Olympic-size swimming pool has a racing course length of 50.000 meters, measured between the automatic officiating equipment touch panels and the end walls or bulkheads in the center of each lane, with a tolerance of +0.010 meters and no negative tolerance. The wall-to-wall distance across the pool is specified as a minimum of 50.020 meters and a maximum of 50.030 meters to account for the installation of touch panels and ensure precision in timing. These measurements are taken at a consistent depth of 0.300 meters above to 0.800 meters below the water surface to maintain uniformity across lanes.[2] The width of the pool must be at least 25.00 meters for permanent installations to support 10 lanes, each exactly 2.50 meters wide, allowing for eight competition lanes with additional buffer lanes on the sides. For Olympic Games, permanent pools must be at least 25.00 meters wide and temporary pools must be 26.00 meters wide; the standard configuration uses eight lanes of 2.50 meters each, with at least 2.50 meters of space outside the first and eighth lanes, though up to 10 lanes may be approved for broader use. This width ensures straight parallel side walls that are perpendicular to the racing course at 90 degrees, with a tolerance of ±0.05 degrees for sides and ±0.3 degrees for end walls, promoting fair racing conditions.[2] The layout incorporates vertical end walls with non-slip surfaces extending 0.8 meters below the water level to enhance safety during turns and starts. Surrounding the pool, the deck features non-slip flooring to prevent accidents, with a minimum width of 2.5 meters around the perimeter for officials, athletes, and equipment access. If integrated with diving facilities, a minimum separation of 8 meters is required between the swimming pool and diving well to accommodate safe operations and official areas.[1][8] The 2.50-meter lane width is justified by the need to allow swimmers full arm extension during strokes such as breaststroke and butterfly, while providing buffer space to avoid contact with adjacent lanes during turns, considering the arm spans of elite swimmers, which often exceed 2 meters. Orthogonality is verified by ensuring equal diagonals across the pool within ±10 millimeters, certified using precise surveying equipment for compliance.[2]Depth and Water Volume
Olympic-size swimming pools require a minimum depth of 2.50 meters throughout the racing course to provide uniform hydrodynamic conditions and reduce bottom reflection effects on wave propagation. The depth is defined and measured as the vertical distance from the water surface to the pool bottom, in accordance with World Aquatics certification requirements (measured at multiple points per lane with the pool full of water) and aligned standards such as Swimming Australia's Facilities Rules, which specify similar principles for safety, diving, and starting platforms.[2][9] A depth of 3.00 meters is recommended for facilities hosting multiple aquatic disciplines to minimize wave interference and support diving integration.[2][10] In multi-use facilities that accommodate recreational or other aquatic activities, shallower depths may exist outside the designated racing lanes; however, the racing course itself must preserve a uniform minimum depth of 2.50 meters across all competition lanes to comply with standards.[4] The water volume of such a pool is determined by the basic formulawhere is the length (50 meters), is the width (25 meters), and is the depth (2.50 meters), yielding an approximate volume of 3,125 cubic meters for a standard configuration.[11] This calculation assumes a rectangular basin without accounting for additional structural features. Actual volume can vary slightly due to overflow gutters, which capture excess water to maintain level surfaces and prevent wave bounce, and displacement from installed equipment such as starting blocks, lane dividers, and backstroke flags.[1][12]
