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Muscle Cells Strengthen In Response To Intense Exercise - Whether You're 18 Or 88. But The Intensity Is What's Lacking In Most People's Workouts. And There Are Doctors Who'll Give You The Advice, "well, Don't Push It."
-Jack LaLanne
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Muscle Cells Strengthen In Response To Intense

Jack LaLanne
Muscle Cells Strengthen In Response To Intense Exercise - Whether You're 18 Or 88. But The Intensity Is What's Lacking In Most People's Workouts. And There Are Doctors Who'll Give You The Advice, "well, Don't Push It."
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