WebMD:

Pain Is Not Necessary for Health and Fitness, but Walking Is

Calm down. Women who lift weights don't get bulky muscles. Pain is not necessary to achieve gain. A huge time commitment is not required for health and fitness. And what about walking? Is walking all it's cracked up to be?

The American Council on Exercise (ACE) is helping us sort through what we've heard about health and fitness -- the myths vs. the truth.

What's written about walking does hold water, he says. "If America began to walk even a minimal amount -- 30 minutes a day -- it would turn around the epidemic of heart disease and obesity."

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