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. mostrou que a elevação do pernas pelo solo melhora a postura e o alinhamento da coluna https://sirketlist.com/story19562873/n%C3%A3o-conhecido-fatos-sobre-abdominal-crush