Start in a supine position lying flat on the ground, your face and torso facing up. Make sure your feet are firmly placed on the ground and your hands are by your temples.
Crunch up into a seated position.
Punch one arm across your body, rotating from your torso and finding length in your arm, palm facing down.
Next perform a hook with the same arm. Your elbow is at a 90-degree angle, rotating from the torso, with your palm facing you or facing down.
Repeat on the other side.
Perform for one minute. Rest for 20 seconds before moving on to the next exercise.