It is an art of proportion of water through limbs, when the displacement of water is more than the body weight is called swimming. Swimming is an activity that burns lots of calories, is easy on the joints, supports your weight, builds muscular strength and endurance, improves cardiovascular fitness, cools you off and refreshes you in summer, and one that you can do safely into old age.
In swimming, four major styles have been established. They are:
The butterfly is a swimming stroke swum on the breast, with both arms moving symmetrically, accompanied by the butterfly kick (also known as the "dolphin kick"). While other styles like the breaststroke, front crawl, or backstroke can be swum adequately by beginners, the butterfly is a more difficult stroke that requires good technique as well as strong muscles. It is the newest swimming style swum in competition, first swum in 1933 and originating out of breaststroke.
As its name suggests, backstroke is swum on the back. It uses alternating circular arm movements and an above water recovery. The legs execute a flutter kick similar to the one used in freestyle. Backstroke is faster than breaststroke but slower than butterfly. Physicians often prescribe backstroke swimming to people experiencing back problems because it gives the back an excellent workout.
Breaststroke is the most popular swim stroke of all. In breaststroke, both arms execute half-circular arm movements at the same time under water in front of the swimmer. The arm recovery also occurs under water. The legs simultaneously execute a whip kick.
Breaststroke is often the first swimming stroke taught to beginners. In fact, many casual swimmers can only swim this stroke.
The advantage of breaststroke is that beginners can keep their head above the water. This avoids breathing and orientation issues. More experienced swimmers however submerge their head during the stroke cycle to improve efficiency.
The Freestyle Stroke or front crawl is often the preferred stroke of seasoned swimmers. It uses alternating arm movements with an above water recovery. The legs execute a flutter kick. Freestyle is fast and efficient. In fact it is the fastest of all swimming strokes. That’s why it is used in freestyle competitions and in the swimming leg of triathlons.