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Why it's a winner: Squats work multiple muscle groups — the quadriceps, hamstrings, and gluteals — at the same time.
How to: Keep your feet shoulder-width apart and your back straight. Bend your knees and lower your rear as if you were sitting down in a chair, keeping your knees over your ankles.
Technique Tip
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Practice with a real chair to master this move. First, sit all the way down in the chair and stand back up. Next, don't sit all the way down; barely touch the chair's seat before standing back up. Lastly, graduate to doing squats without a chair.
source:webmd
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