This exercise uses a barbell behind your neck to isolate the triceps effectively.
Muscle group: Triceps
Sit on a short straight back chair with your feet firmly placed on the floor and your back straight.
Grasp an EZ or Curl bar (or barbell) with and grip about 6 inches apart.
Raise the bar to arms length above your head and then lower the bar in an arc towards the floor behind your head.
Return to starting position.