Step by step instructions
Lie faceup on the floor or a bench with knees bent and feet flat, holding dumbbells. Extend arms above chest (weights should line up over midline of chest) with palms facing away from body.
Bend right elbow, lowering arm toward the floor to the side of shoulders (arm should make a 90-degree angle from shoulder). Extend arm to return to starting position. Continue, alternating arms each rep.