Swimming is an activity that involves human movement in water by using the arms and legs. It is an activity that can be done for leisure, exercise as well as a sport. The activity has been practiced by humans since long ago and people are still encouraged to undertake in the same due to its health benefits. It helps in burning calories, cardio vascular fitness and strengthens body muscles. People have perfected the art of swimming and today it is one of the major recognized competitive sports in various world such as the Olympics. There are several styles of swimming recognized today which include freestyle, breaststroke, backstroke, and butterfly.