Pick up the heavy dumbbells and stand with your feet hip-width apart. Push your hips back (knees slightly bent) and hinge your torso forward, so it’s approaching parallel to the floor. (Keep your chest “proud” and don’t let your lower back hunch forward.) Begin holding the dumbbells end to end, then pull them up by bending your elbows out to the side. You want your shoulder blades to pinch together in the back. Control the weights as you bring them back down to the hanging position, but don’t let your chest collapse in.