The overhead dumbbell triceps extension is a triceps isolation exercise performed standing or seated: holding a single dumbbell with both hands behind the head, you extend the elbows to raise it overhead, then lower it back down with control. It isolates the triceps, particularly the long head, through a full range of motion. This exercise is commonly used as light accessory work to support pressing strength.
Technique: sitting or standing with a tall, neutral spine, hold a single dumbbell with both hands behind the head, upper arms close to the ears and roughly vertical. Lower the dumbbell behind the head by bending only the elbows, then extend the elbows to bring it back overhead, keeping the upper arms stationary throughout — only the forearms should move.
Common technical errors: letting the elbows drift outward or forward during the movement, which shifts work away from the triceps; arching the lower back to help move the weight instead of keeping the torso still; using a weight heavy enough that full elbow extension can't be controlled; and rushing the lowering phase instead of controlling it.
Technique: sitting or standing with a tall, neutral spine, hold a single dumbbell with both hands behind the head, upper arms close to the ears and roughly vertical. Lower the dumbbell behind the head by bending only the elbows, then extend the elbows to bring it back overhead, keeping the upper arms stationary throughout — only the forearms should move.
Common technical errors: letting the elbows drift outward or forward during the movement, which shifts work away from the triceps; arching the lower back to help move the weight instead of keeping the torso still; using a weight heavy enough that full elbow extension can't be controlled; and rushing the lowering phase instead of controlling it.