The short crunch conditions the rectus abdominis through a short range of motion. It requires a concentrated contraction as you press upward.
Lie on your back with your knees bent, feet flat on the floor, hands placed behind head. Begin with the upper body lifted midway and the abdominal muscle held in tight. Keep head and neck in alignment and moving as one unit.
Lift the upper body a short distance, keeping the abdominal muscle contracted. Concentrate on the lift upward. Breathe and repeat for 8 times. Progress to 3 sets of 8 times.
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