Attach a resistance band to a door anchor. Place the door anchor at the bottom of a door. Attach a handle to the other end of the resistance band. Grab handles with overhand grip. Start with knees bent, feet shoulder width apart, leaning slightly forward and holding the handle with both hands just outside of your bent thigh.
Keeping your back straight, lift the handle upwards across your body in one movement, until your hands are above your right shoulder. Return to starting position and repeat.