Performing the: A Step-by-Step Tutorial Barbell Seated Overhead Triceps Extension
Extend your arms completely so that the barbell is directly above your head.
Slowly bend your elbows to lower the barbell behind your head, keeping your upper arms stationary and close to your head with elbows in and perpendicular to the floor.
Lower the weight until your forearms touch your biceps, ensuring that only your forearms move and not your upper arms.
Finally, use your triceps to return the barbell to the starting position above your head, repeating the movement for the desired amount of repetitions.