How To Use Your Biggest Fat Burning Muscles—Without Killing Your Knees

It’s no secret that the biggest fat burning muscles in your body are your legs.  They are the largest muscles in your body and therefore require the most amount of energy when used.  Since your legs are the primary muscles that drive your heart rate up, the more you use them the harder your heart pumps.  And the harder your heart works, the more calories you burn and the fitter you get.  So if you want to keep up your fitness and fat burning progress, you’d better take care of your legs—especially your knees.

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