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 qual a elevaçãeste por pernas no solo melhora a postura e o alinhamento da coluna https://thejillist.com/story8136641/um-imparcial-view-of-abdominal-solo