Have you heard of the benefits of hand exercise for hammers? Pick up the dumbbells and stand up straight. In the starting position, hands with dumbbells on the sides of the torso, grip neutral (palms toward you). Breathe in and hold your breath. Bend the arm in the elbow with the biceps force, and lift the dumbbell up as high as possible. Secure your elbows on the sides of your torso...
