Hold a pair of dumbbells in your hands with your arms straight and your palms facing away from you. Step your feet apart so there's about 20 inches between your heels. Point your toes out slightly.
When you're ready, bend your knees and elbows at the same time. Keep your shoulders over your hips, and lower down so your weight is back in your heels. Then straighten your legs and arms. This is one rep.