Stand with your feet hip-width apart and pointing straight ahead while holding a dumbbell in each hand. Draw your navel in toward your spine, and contract your abdomen to stabilize your spine. Bend your arms and draw the dumbbells up to rest on your shoulders. Keep your elbows wide and your palms facing forward. Keep your knees slightly bent and your back flat as you hinge forward at your hips, and lower your torso parallel to the floor while keeping the dumbbells glued to your shoulders. Return to the starting position without releasing your abdominals.