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. Vale lembrar que todos ESTES exercícios supra podem ser efetuados usando as pernas Ainda mais estendidas https://www.tiktok.com/@renatocariani_mrc/video/7414680781056003333