Twist Crunch - Alternate
Lie down on your back with your knees bent and your feet on the floor. Place your hands to the side of your head, but do not hold your head.
Now aim your right elbow to your left knee making sure that at the end of the movement your right shoulder blade is off the ground.
Slowly lower yourself back down to the ground and then aim your left elbow over to your right knee and go as far as your left shoulder blade leaves the ground.
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