Crunching Too High The ab crunch is a subtle movement that lifts the shoulder blades a few inches off the floor. Jerking the shoulders up adds momentum and reduces the effectiveness of the exercise. Bring your shoulders 1 or 2 inches off the floor imagining you are bringing your ribs https://bookmarklinx.com/story18160517/o-truque-inteligente-de-abdominal-solo-que-ningu%C3%A9m-%C3%A9-discutindo