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Primal Shred Muscle Lie down flat, going through the ground. Now bending your elbows, and setting your forearms and arms flat on the floor, elevate your whole body off the floor, so that you are resting only your forearms and toes. Maintain this position, tightening your center muscular tissues, for about 30 seconds. 7. Back Extensions with Balls: Lie at the workout ball, facing downwards, and positioning it below your hips, your toes resting at the ground.
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