The overhead tricep extension is an excellent isolation exercise for targeting the triceps, helping build strength and muscle definition.
Common questions about form, safety, equipment, and alternatives for this exercise.
Overhead tricep extension trains all three heads of the triceps, but it is especially good for the long head because the arms are positioned overhead.
The long head crosses the shoulder joint, so putting the arm overhead places it in a stretched position. That usually makes this variation feel different from pushdowns or close-grip presses.
The exercise should create tricep tension, not sharp elbow pain. Reduce the weight, slow the lowering phase, avoid flaring too hard, and try cables or a rope if a fixed implement feels rough on the joints.
All can work. Dumbbells are simple and accessible, cables keep constant tension and often feel smoother on the elbows, and an EZ-bar can allow heavier loading if shoulder mobility allows it.
That usually means your upper arms are drifting too much, the weight is too heavy, or your shoulder mobility is limited. Keep the elbows pointing mostly forward, brace the ribs down, and use a load you can control.