If you just want to have fun, it is better to swim in summer (August-September) to cool off the heat. If you want to keep fit, it is recommended to swim in winter (65438+February-65438+1October).

Winter swimming is a sport that can eliminate diseases and prevent diseases, strengthen the body and entertain and educate. Many people like winter swimming because it has the characteristics of "short exercise time and great fitness effect".

Freestyle requirements:

1. Any swimming style can be used in freestyle competition. But in individual medley and medley relay, freestyle refers to swimming methods other than butterfly, backstroke and breaststroke.

2. Every time you turn around and reach the finish line, a certain part of the athlete's body will touch the pool wall.

During the whole tour, a certain part of the athlete's body must be above the water. At the start and after each turn, athletes are allowed to be completely immersed, and their heads must be above the water before15m (including15m).