World Aquatics regulations require an Olympic-sized swimming pool to be 50 meters, or approximately 164 feet, long. This measurement is taken from end to end of the pool, including the touch ...

Most swimming events will be in La Défense Arena's 660,000-gallon Olympic swimming pool, according to NBC Olympics. The Seine will host triathlon and marathon swimming races.

Nevertheless, swimming stands out in one respect: It takes place in water, or more precisely, in a pool filled with water. And the shape of the pool can have a strong influence on the performance ...