HOW: Begin by lying on your stomach with your forehead on the ground supported. Bring your arms overhead. From here, lift your head up as you lift your arms up while continuing to keep them straight. Do this in a slow and controlled motion for the prescribed amount of reps.
FEEL: You should feel your shoulder muscles working.
COMPENSATION: Don’t move your lower body. Make sure to lift your head up and look up as you bring your arms up.