This exercise is frequently called a skull crusher, but don't take its nickname seriously. If you lower the weight under control, you'll keep the beautiful face you were born with. Again, this exercise puts the triceps muscles on stretch and works all three triceps brachii heads.
Lie on a flat bench with a straight or curled bar balanced across it just behind the head.
Reach back to grasp the bar with the palms up and lift it overhead. The arms should be at a 90-degree angle to the body.
Slowly bend the elbows to lower the bar toward the tip of the head, then reverse to full extension.
Keep the elbows in tight to the sides of the head throughout the movement.