Set-up: With the legs together and hips up, establish proper upper body posture with a neutral back. Place your hands on the ball with fingers pointing forward and a stable grip.
Movement: Press the chest off the ball until the 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.
Optional weighting: External resistance may be added to the exercise through the use of a weight vest, chains, or even a sturdy loaded back-pack.