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The most common purpose for swimming is recreation. Recreational swimming is
considered
by many a good way to relax, while enjoying a good full-body workout.
Several swimming styles are suitable for recreational swimming; most
recreational swimmers prefer a style that keeps their head out of the water and
has an underwater arm recovery. Breaststroke, side stroke, and dog paddle, are
the most common strokes utilized in recreational swimming, but the out-of-water
arm recovery of freestyle or butterfly gives rise to better exploitation of the
difference in resistance between air and water.
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Swimming is an excellent form of exercise. Because the density of the
human body is approximately similar to that of water, the body is
supported by the water and less stress is therefore placed on joints
and bones. Therefore, swimming is frequently used as an exercise in
rehabilitation after injuries or for those with disabilities.
Resistance swimming is one form of swimming exercise. It is done
either for training purposes, to hold the swimmer in place for stroke
analysis, or to enable swimming in a confined space for athletic or
therapeutic reasons. Resistance swimming can be done either against a
stream of moving water (often termed a swimming machine) or by holding
the swimmer stationary with elastic attachments.
Swimming is primarily an aerobic exercise due to the long exercise
time, requiring a constant oxygen supply to the muscles, except for
short sprints where the muscles work anaerobically. As with most
aerobic exercise it is believed to reduce the harmful effects of
stress. Swimming can improve posture and develop a strong lean
physique, called, logically, a "swimmer's build:" lean and spare
throughout, with wide shoulders and a smaller lower body. |
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