Prone Body Extension
Setup: Lie down on your stomach while holding a 5- to 8-pound FitFighter on each hand.
Action: At the same time, lift your legs, chest and arms straight off the ground and hold. To increase difficulty, you can extend both arms above your head once you lift your body and revert it to the original position before you lower your body back to the ground. This exercise will work on one’s posterior. Repeat for 10 to 15 reps.