Directory For a Sex Photos : the-exercist: Are Quivering Muscles a Good Thing? Pushing yourself during a workout can certinly feel good, and going so hard that your muscles start to shake is a sign that you’re at your max—but your body may also be trying to tell you something.
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» the-exercist: Are Quivering Muscles a Good Thing? Pushing yourself during a workout can certinly feel good, and going so hard that your muscles start to shake is a sign that you’re at your max—but your body may also be trying to tell you something.