Primary Muscle Group: Latissimus Dorsi
Muscle Groups Worked in This Exercise: Gluteus Maximus
Preparation: Sit on the ball, knees bent and feet flat on the floor.
Breathing: While raising your arms overhead, slowly exhale. As you return to the starting position, slowly inhale.
Execution: Slide your torso down the ball as you walk your feet forward until your lower to mid-back presses into the ball; exhale. Lean back over the ball, letting the ball support the natural arch in your back. As you return to the starting position, inhale and come to rest lying back on the ball with your arms on your thighs.