This back exercise has the added benefit of strengthening your abdominal core and boosting your stamina. Grasp two dumbbells-hexagon ones if possible-and position yourself as though you were going to do wide grip push-ups.
But instead of placing your feet close together, spread them wider than shoulder width apart. Move into the 'up' push-up position. Your legs should be straight and your butt should be slightly raised. Once in position, raise one of the dumbbells up in a rowing motion, just like you do for a one-armed row.
Maintain the other arm in the same position, keep your back straight and stop when your elbow is just past your back. Pause for a one-count, return to the start position and perform the same movement using the other arm.