Summary
Jeff Cavaliere of ATHLEAN-X debunks a common misconception about tricep pushdown grip variations. While basic anatomy suggests grip orientation shouldn’t matter for tricep activation, real-world biomechanics — specifically shoulder rotation — explains why lifters genuinely feel a difference between pronated and supinated grips. The key mechanism is shoulder rotation, not forearm position alone.
Key Points
- The common myth: Changing grip on a tricep pushdown (overhand vs. underhand) has no effect on muscle activation, because the triceps have no attachment crossing the elbow to the radius (unlike the bicep).
- Why people do feel a difference: The difference is real, but the cause is shoulder rotation, not wrist or forearm supination/pronation in isolation.
- Pronated (overhand/palm-down) grip causes internal rotation at the shoulder, which places the lateral head of the tricep at a better mechanical advantage and line of pull.
- Supinated (underhand/palm-up) grip causes external rotation at the shoulder, which better targets the long head of the tricep — the larger, meatier inner portion near the pec.
- Pronation is technically a forearm/elbow movement, not a wrist movement — the wrist turning is simply a byproduct of forearm rotation.
- The same principle of mechanical advantage through joint positioning applies to bicep training, where grip width affects short head vs. long head activation.
- “Real world science” — observing what actually happens at multiple joints during a movement — can contradict oversimplified anatomical conclusions.
Exercise Details
Tricep Pushdown (Pronated vs. Supinated Grip)
-
Target muscles:
- Overhand/pronated grip → emphasizes lateral head of the tricep
- Underhand/supinated grip → emphasizes long head of the tricep
-
Proper form cues:
- Recognize that shoulder rotation is the functional driver of head-specific activation
- With supinated grip, allow natural external rotation at the shoulder to occur
- With pronated grip, internal rotation at the shoulder accompanies the movement
-
Common mistakes to avoid:
- Assuming grip change has no effect (oversimplified anatomical thinking)
- Assuming the effect is purely from wrist/forearm position rather than what’s happening at the shoulder
- Ignoring multi-joint mechanics when analyzing exercise feel and effectiveness
-
Sets/reps: Not specified in this video