Muscles worked: Ab’s, Gluteus, hamstrings, quads, back stabilizers
Purpose: Strength and stability
Form: Lying on your back, with one knee bent, extend your opposite knee. The heel of the extended leg should be about 2 or 3 feet above the floor. Place your arms by your sides, palms down. Using only one leg, raise your hips off the floor as high as you can. Briefly hold the position, then slowly lower your hips & repeat with each leg.
Special conditions: your head should remain on the floor at all times.