How many sets and reps of the machine triceps extension should a beginner do?

Three sets of 12 to 15 reps is a good starting range, since the fixed path makes it safe to push closer to failure than a free-weight move. Add weight in the machine's smallest increment once you can hit the top of that range with a full squeeze at lockout on every rep.

What can I use instead of the triceps extension machine if my gym doesn't have one?

A cable pushdown or a lying dumbbell extension both isolate the triceps in a similar fixed, elbow-driven path without needing this specific machine.

Who is the machine triceps extension best for?

It's an easy first triceps exercise for beginners still learning to isolate the elbow, and a safe way for anyone to push close to failure at the end of a workout. It's a poor primary builder once you're advanced, since the fixed path won't let you chase the long-head stretch that free-weight overhead work provides.

Beginner

Machine Triceps Extension

With your upper arms pinned to a pad, the triceps extension machine removes any need for balance so you can push the muscle to failure safely. The fixed groove keeps tension even and makes it easy to add small, precise jumps in load. It's an ideal first triceps exercise for beginners and a reliable finisher for everyone else.

Equipment: Machine
Body part: Triceps
Type: Strength
Browse by muscle: Triceps Brachii Lateral Head, Triceps Brachii Medial Head, Triceps Brachii Long Head
Browse by movement: Elbow Extension

How to do it

1
Adjust the seat so your upper arms rest flat on the pad and shoulders sit comfortably.
2
Grip the handles and set your elbows in line with the machine's pivot.
3
Brace your core and keep your upper arms pressed into the pad.
4
Extend your elbows to push the handles through to full lockout.
5
Squeeze the triceps for a beat at the bottom.
6
Return under control until your forearms pass parallel, then repeat.

Tips

Keep the upper arms flat on the pad so only the forearms move.
Set the elbows to match the machine's axis so the path feels natural.
Stop the negative just short of the weights touching down to keep tension.

Variations

Common mistakes

The upper arms lift off the pad as the handles come down, letting the shoulders help finish reps the machine is supposed to isolate.
Sitting with the elbows below or above the machine's pivot point turns a smooth arc into a path that binds partway through.
Letting the weight stack crash down between reps trades away the last portion of tension the machine is built to keep constant.
A seat set too high or low leaves the handles out of a natural line, so the wrists bend to compensate on every rep.

Frequently asked

How many sets and reps of the machine triceps extension should a beginner do?: Three sets of 12 to 15 reps is a good starting range, since the fixed path makes it safe to push closer to failure than a free-weight move. Add weight in the machine's smallest increment once you can hit the top of that range with a full squeeze at lockout on every rep.
What can I use instead of the triceps extension machine if my gym doesn't have one?: A cable pushdown or a lying dumbbell extension both isolate the triceps in a similar fixed, elbow-driven path without needing this specific machine.
Who is the machine triceps extension best for?: It's an easy first triceps exercise for beginners still learning to isolate the elbow, and a safe way for anyone to push close to failure at the end of a workout. It's a poor primary builder once you're advanced, since the fixed path won't let you chase the long-head stretch that free-weight overhead work provides.

Related exercises

Other movements among FitRay's 2,000+ exercises that load the same target muscle — same equipment and level first.

All Triceps exercises