Humans swim usually consists of repeating certain body movements or swim strokes to push the body forward. There are many types of strokes, each defining a different swimming style or crawling
In high school, college, and Olympic swimming, there are two wavy movements (chest style, and butterfly stroke), and two back and forth moves (front crawling and backstroke).
Most strokes involve rhythmic and coordinated movements of all major body parts - body, arms, legs, hands, feet, and head. Breathing usually has to be synchronized with stroke as well. However, it is possible to swim simply by moving the feet without the hands or just the arms without the feet; Such scratches may be used for special purposes, for training or training, or by the amputees (paralympians) and paralytic
Some accent marks are only used for special purposes, for example to manipulate objects (swimmers in distress, balls), or just to stay afloat.
Swimming under water
Any style with underwater recovery can be done underwater for some distance depending on air requirements. The underwater swimming pool at the rear has additional water problems going into the nose. To avoid this, the swimmer can breathe through the nose or wear a nose clip. Some swimmers can close their nostrils with the upper lip or with the naris muscle of the compressor.
- Pull-down Breaststroke: the most common under water stroke due to very low energy demand. The main application is for dynamic apnea (DNF)
- Dolphin kick: very fast underwater swimming style eg. Ryan Lochte 50m Underwater - 20.8 SCY
- Seal of sea lions: This swimming stroke is mainly done by paddling, the arms along the side of the body line and strongly supported by flutter kicks in contralateral sequencing. This can be identified with the sea lion swim style. It is very effective for swimming through the narrow underwater places.
Undulatory swimming
The hydrodynamic pool has significantly applied BCF to the technique. In addition, the study of irregular motion, irregularly tail-body iruilliformis, and unrelated Median pairs of fins provide an interesting conclusion. This natural mode is seen as an alternative to the BCF technique that introduces some missing elements as buoyancy, gliding and floating to complete the human hydrodynamic scale.
Source of the article : Wikipedia
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