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 de pernas no solo melhora a postura e este alinhamento da coluna https://bookmarkstumble.com/story19676089/o-melhor-lado-da-abdominal-crush