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 de que todos ESTES exercícios acima podem vir a ser efetuados usando as pernas https://livebookmarking.com/story18048665/abdominal-crush-no-further-um-mist%C3%A9rio