Human swimming typically consists of repeating a specific body motion or swimming stroke. There are many kinds of strokes, each defining a different swimming style or crawl.
Most strokes involve rhythmic and coordinated movements of all major body parts — torso, arms, legs, hands, feet, and head. Breathing typically must be synchronized with the strokes, too. It is possible however to swim by moving only legs without arms or only arms without legs; such strokes may be used for special purposes, for training or exercise, or by amputees (paralympians) and paralytics.
Read more about Swimming Stroke: Special Purpose Styles
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