To do an overhead tricep extension properly, hold a dumbbell behind your head with elbows pointing forward. Extend the arms to full lockout overhead. Lower with control for 2 to 3 seconds. Keep upper arms stationary — only the elbows move. The overhead position makes this the single best exercise for the long head of the triceps.
Why Overhead Extensions Target the Long Head
The long head is the only head of the triceps brachii that crosses the shoulder joint — it originates from the scapula. When the arm is overhead, the long head is stretched across the shoulder, placing it under greater tension through the full range of motion. This stretch-mediated activation is why overhead extensions produce higher long head EMG readings than any pushdown or pressing variation.
Since the long head is the largest of the three heads and contributes the most to overall arm size, overhead extensions are essential for anyone pursuing maximum tricep development.
Dumbbell Overhead Extension: Step-by-Step
Two-Hand Version
Sit on a bench with back support (or stand with feet shoulder-width). Hold a single dumbbell with both hands, palms supporting the underside of the top weight plate. Press the dumbbell overhead to the starting position — arms fully extended. Keeping elbows close to your ears and pointing forward, lower the dumbbell behind your head by bending the elbows. Lower until you feel a deep stretch in the triceps (forearms should approach a 90-degree angle or slightly beyond). Extend back to full lockout. Squeeze at the top.
Programming: 3 sets of 10 to 15 reps.
Single-Arm Version
Hold one dumbbell overhead with one hand. Lower behind the head, extend. Use the free hand to stabilize the working elbow if needed. Single-arm work corrects imbalances and allows a slightly greater range of motion.
Key Variations
Cable Overhead Extension
Face away from a cable machine with a rope attachment set at the lowest position. Grip the rope behind your head and extend overhead. Cables provide constant tension and a smoother resistance curve than dumbbells — less joint stress, especially at the bottom of the movement. This variation is the most elbow-friendly overhead option.
Barbell / EZ Bar Overhead Extension
Allows heavier loads than dumbbells. Use an EZ bar with a close grip (inside curves) to reduce wrist strain. Can be performed standing, seated, or lying on a flat or incline bench (the "lying tricep extension" or French press variation). Using an EZ bar is generally more comfortable than a straight bar.
Resistance Band Overhead Extension
Step on a resistance band, grip behind the head, extend. Ascending resistance matches the tricep strength curve. Excellent for home training and warm-ups. See our band exercise guide.
Kettlebell Overhead Extension
Hold by the horns behind the head. Offset center of gravity adds stability demand. See our kettlebell guide for full details.
Common Mistakes
Elbows flaring out. Keep elbows pointing forward and close to the ears. Flaring shifts stress to the shoulders and reduces long head activation.
Using momentum. Swinging the weight up defeats the purpose. Lower with a 2 to 3 second eccentric and press with controlled force.
Incomplete range of motion. Lower deep enough to feel a stretch in the long head. Cutting the ROM short leaves the most productive part of the exercise on the table.
Going too heavy. Overhead extensions are an isolation exercise. If you cannot control the weight for 10 clean reps, reduce the load. Heavy overhead work with poor form is a fast track to elbow problems.
Programming Overhead Extensions
Include 2 to 4 sets of overhead extensions per week. Pair them with pushdowns for the lateral head and compound pressing for overall mass. This combination covers all three heads. See our best tricep exercises ranking for how overhead extensions fit into a complete program.
Warm up with tricep stretches and light sets before working weight. If elbows or shoulders are sensitive, use the cable variation — it is the smoothest and most forgiving option. For a comparison with lying variations, see our skull crushers vs extensions guide.
