Stand with your feet a little closer than shoulder-width apart, dumb-bells placed at the outside of each foot. Bend at the knees and grasp a dumb-bell in each hand.

From here, tense your body and stand up, keeping your elbows straight, dumb-bells at your sides, head up and lower back arched. Once you reach a standing position, reverse, bringing the dumb-bells down to the floor. Since these are 'power' reps, it's OK to touch down between each rep, focusing all your energy on driving up through your legs to come to a standing position.