Every type of exercise has its selling points. But swimming is unlike any other aerobic workout in a few important ways.
First, the fact that you’re submerged in water means your bones and muscles are somewhat unshackled from the constraints of gravity, says Hirofumi Tanaka, a professor of kinesiology and director of the Cardiovascular Aging Research Lab at the University of Texas.
This makes swimming the ideal exercise for people with osteoarthritis, for whom weight-bearing exerci
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