The heart is the only muscle that contracts and relaxes continuously over a lifetime to pump oxygen-rich blood to the body's organs. Researchers at UT Southwestern Medical Center now have identified a ...
Fitgurú on MSN
The "second heart" in your legs: Why your calves are the secret to cardiovascular longevity
Your lower legs do much more than just keep you upright and moving through the day. Science reveals that your calf muscles ...
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