Grab a pair of dumbbells and position yourself as if to do a set of pushups with your feet slightly wider than shoulder-width apart. Keeping your lower back flat and abs braced tight, row one dumbbell up by drawing your elbow past your torso, as you support your body weight on the other side. Pause at the top for a second, then lower and repeat with the other side. Try to keep your hips as still as possible the entire time you're rowing.
