With your arms at chest height, swing your arms backwards as far as possible while still maintaining control. Bring your shoulder blades together and then swing your arms back in front of your body. Stand with your feet shoulder-width apart with a slight bend in your knees. The straighter your arms are, the more intense the exercise will be. Stabilize your spine and torso, and do not make any unnatural or jerking movements.
Variation 1: This exercise can also be performed in stride.
