Perform the press by pushing the weights overhead while rotating your arms to face away from you at the top. Perform the press by pushing the weights overhead while rotating your arms to face away from you at the top. Standing crunches: Hold a dumbbell in each hand overhead and stand with your feet hip-width apart. Windmills: Stand with your feet wider than shoulder-width and hold a weight in your right hand. Keep your right arm punched overhead and your gaze on your right hand.