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 também: A coleção por Veículos de luxo por Renato Cariani que deixaria colecionadores por boca https://sites2000.com/story7682281/orienta%C3%A7%C3%B5es-topo-da-renato-cariani