Set-up: Place your feet on the ball with the legs together and hips up. Establish a neutral back position by squeezing the glutes and bracing through the core. Place your hands on the floor at slightly wider than shoulder width - so that the upper arms are tucked at 45-degree angle to the torso - with fingers pointing forward.
Movement: Press your chest off the floor until your arms are straight, then return to the starting position. Cue the descent by attempting to pull yourself down to the floor with your shoulder blades.
Muscle Roles in stability ball pushup - feet on ball