Dead Bug
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Benefits front and underlying abs
• Lie down and bend your knees so your feet are flat on the floor.
• Tighten your abs and raise your bent legs so your knees are over your hips, bringing both arms up halfway overhead.
• Move one arm up while straightening out the opposite leg and not letting it touch the floor.
• Keep your abs tight as you come back to the starting position.
• Then repeat on the other side.
See a photo of this exercise.