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. Segure a barra utilizando as palmas das mãESTES voltada para baixo. As mãESTES devem manter-se separadas https://www.tiktok.com/@renatocariani_mrc/video/7414680781056003333