Include an overhead triceps extension if your elbows and shoulders tolerate it. In a 12-week MRI trial, overhead cable extensions grew the whole triceps about 20%, against about 14% with the arms at the sides, even though the overhead arm lifted 34 to 39% less weight. It is one trial, and the arms-down version still grew well, so keep pushdowns if you like them.
Why would arm position matter?
The triceps has three heads. The long head crosses both the shoulder and the elbow, so raising your arm overhead stretches it. The lateral and medial heads cross only the elbow.
So overhead work trains the long head at a longer length. The surprise in this trial is that the other two heads grew more as well, which the simple stretch explanation doesn’t predict.
What did the study find?
Maeo and colleagues trained 21 adults for 12 weeks. One arm did cable elbow extensions overhead and the other with the arm at the side. Both did 5 sets of 10 reps, twice a week, at 70% of one-rep max, through the same 90 degrees of elbow movement.
| Measure | Overhead | Arms down |
|---|---|---|
| Whole triceps | +19.9% | +13.9% |
| Long head | +28.5% | +19.6% |
| Lateral and medial heads | +14.6% | +10.5% |
| Absolute load | 34 to 39% lower | Higher |
Strength on the machine rose about the same in both arms (62 to 71%), so the bigger growth didn’t come from getting stronger faster.
How much should you trust this?
Moderately. MRI and a one-arm-each design make it a clean comparison. But it is a single trial of 21 people, and it tested a set 90-degree range on a cable. It compared arm positions, not specific attachments, so it doesn’t tell you a rope beats a bar. Don’t stretch it into a claim that pushdowns are a waste of time. The arms-down arm still grew 14%.
Wider claims about stretched-position training are less certain, as our guide to lengthened partials explains.
What should you do with it?
- Pick one overhead exercise. A cable, dumbbell or EZ-bar overhead extension all put the arm in that position, though only the cable version was tested.
- Expect lighter weights. Lifting a third less overhead is normal in this trial. It isn’t a sign that you’ve become weaker.
- Keep pushdowns if they feel better. If overhead work bothers your shoulder or elbow, use what you can do without pain. This is general information, not medical advice.
- Count all of it. Pressing also trains the triceps, so check your total before adding more.
How to log it
Log overhead and pushdown as separate exercises, since the loads aren’t comparable. Use the same attachment and the same range each session, so the numbers mean something.
Example log (invented numbers, not a recommendation):
| Week | Exercise | Sets |
|---|---|---|
| 1 | Overhead cable triceps extension | 20 kg × 10, 10, 9 at 1 RIR |
| 2 | Overhead cable triceps extension | 20 kg × 10, 10, 10 at 1 RIR |
| 3 | Overhead cable triceps extension | 22.5 kg × 10, 9, 8 at 1 RIR |
FitArchive keeps each variation separate, stores weight, reps and RIR for every set, and adds them up in your weekly sets per muscle. It’s free, with no account needed to start.
