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. Veja similarmente identicamente conjuntamente: A coleçãeste de Veículos por luxo de Renato Cariani de que deixaria https://www.tiktok.com/@renatocariani_mrc/video/7414680781056003333