Begin with a dumbbell in each hand. Stand with your feet hip-width apart.
Bring the weights to your chest with your palms facing each other. Make sure to relax your shoulder blades down so your shoulders don't tense up by your ears.
Keeping your core tight, rotate your abdomen slightly toward the right as you punch across your body with your left hand. Bring your left hand back to your chest, and repeat this punch with your right hand.
Try to keep your lower body still throughout the movement.
This counts as one rep. Continue alternating for one minute.