Rules and Regulation
Freestyle means "any style" for individual swims and any style but breaststroke, butterfly, or backstroke for the medley relay competitions. The wall has to be touched at every turn and upon completion. Some part of the swimmer must be above water at any time, except for the first 15 meters after the start and every turn. This rule was introduced (see History of swimming) to prevent swimmers from using the faster underwater swimming to their advantage, or even swimming entire laps underwater. The exact FINA rules are:
- Freestyle means that in an event so designated the swimmer may swim any style, except that in individual medley or medley relay events, freestyle means any style other than backstroke, breaststroke, or butterfly
- Some part of the swimmer must touch the wall upon completion of each length and at the finish
- Some part of the swimmer must break the surface of the water throughout the race, except it shall be permissible for the swimmer to be completely submerged during the turn and for a distance of not more than 15 meters after the start and each turn. By that point the head must have broken the surface
Read more about this topic: Freestyle Swimming
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