can get on land, and helps to develop the opposing muscles of your abs - your back. A strong back helps you stand taller, look leaner and balances out your muscle development for a balanced and injury free body. To do: Position your body facedown on the floor, with your arms and legs extended straight front and back. Extend your spine and slightly lift your arms and legs off the floor - just so they are hovering, with your eyes facing down and chin to your chest to avoid neck strain. Lift your left arm up so it is parallel to your ear as you lift your right leg higher than your hip. Quickly switch sides, lifting your right arm and left leg and lowering your left arm and right leg to just above the floor. Repeat this fluttering motion, as quickly as you can, for 30 seconds. US Olympian: misty may-treanor (Yes we've gone for an American on this one...but they really are the Dons of this sport, it seemed only wise) Event: Beach Volleyball Most enviable body part: back Champion volleyball players like Misty May-Treanor have strong back muscles that help them with everything from serving the ball to punting it back over the net. A strong back helps support your spine, improve your posture and even make your waist appear smaller. The Volleyball workout How it works: Do each exercise consecutively, with little to no rest in between, repeating the full circuit up to 3 times in