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The Crunch works your abdominal muscles (rectum abdomens) Starting Position - Lying on your back with your feet a comfortable distance away form your , clasp your hands behind your head. The Move - Bring your upper body up as far as you can. Use only your abdominal muscles, not your neck. Think of it as though you were pushing your navel into the floor. Lower your body slowly back to starting position. The full move should take you about two counts to do if you are working at a medium pace. HINT: On the concentric contraction of the crunch breathe out through your mouth and on the eccentric contraction of the exercise breathe in using your nostrils.
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