Shoulder Press Machine: The Ultimate Guide
A shoulder press machine is a seated overhead press on a guided path. Set the seat so the handles start at shoulder height, press them up until your arms are almost straight, then lower under control. It trains the front delts, with the side delts, triceps and upper chest helping. Most lifters do 3 to 4 sets of 8 to 12 reps.
- 1Start. Seat set so the handles start at shoulder height. Back on the pad, elbows slightly in front of your body.
- 2Top. Press the handles up until your arms are almost straight, then lower them back to shoulder height under control.
Watch 3 video demonstrations
Find more video demonstrations in the Gravitus app
How to use the shoulder press machine
- Sit with your back on the pad and set the seat so the handles start at shoulder height.
- Choose the neutral handles (palms facing) or the overhand handles (palms forward). Keep your wrists straight over your forearms.
- Plant your feet and brace your abs. Your back and head stay on the pad, and your elbows sit slightly in front of your body.
- Press the handles up until your arms are almost straight. Let your shoulder blades rise and rotate with your arms at the top.
- Lower over 2 to 3 seconds until the handles are back at shoulder height, without letting the plates touch.
Seat height: where the handles should start
No study has tested seat height on the shoulder press machine, so start with the handles at shoulder height and adjust from there. Write the seat notch in your log and use the same one every session, or your numbers will not compare.
Neutral or overhand handles?
On one machine, competitive bodybuilders worked their front delts equally hard with a neutral grip pressing in front and a wide overhand grip pressing behind the head. The neutral press drew more upper chest activity; the wide press drew more side and rear delt (Coratella 2022). The two presses also followed different paths, so part of that difference comes from the path, not only the grip. Use the neutral handles if your shoulders complain.
How much weight should you use on the shoulder press machine?
On Gravitus, the median man lifts 95 lb (42.5 kg) for 10 reps on the shoulder press machine, and the median woman 37.5 lb (17 kg).
- Most lift
- 70 to 130 lb
- Top 10% lift
- 170 lb or more
- Starting out
- under 70 lb
- Most lift
- 27.5 to 50 lb
- Top 10% lift
- 70 lb or more
- Starting out
- under 27.5 lb
- Most lift
- 32.5 to 60 kg
- Top 10% lift
- 77.5 kg or more
- Starting out
- under 32.5 kg
- Most lift
- 13 to 22.5 kg
- Top 10% lift
- 32.5 kg or more
- Starting out
- under 13 kg
Shoulder press machine muscles worked
Should you keep your shoulders down?
Not at the top of the press. As your arms go overhead, your collarbones rise and your shoulder blades rotate up and tilt back (Ludewig 2009). That movement makes room for the arm, so pinning your shoulders down and back through the whole rep works against it. What to avoid is shrugging before the press starts, with your shoulders up by your ears at the bottom. Start each rep with your shoulders relaxed and let them rise with your arms.
Three other claims that do not hold up:
- It trains the rear delts. Only a little. Machine presses drew less rear delt activity than barbell presses (Coratella 2022). Add reverse flyes or face pulls.
- The pec minor helps you press. It pulls the shoulder blade forward and down, the opposite of what the shoulder blade does as your arms go overhead.
- Machines build less muscle than free weights. A review of 13 studies found no difference in muscle growth between machine and free-weight training (Haugen 2023).
Shoulder press machine vs dumbbell shoulder press vs Smith machine
| Attribute | Shoulder press machine | Dumbbell shoulder press | Smith machine shoulder press |
|---|---|---|---|
| Path | Set by the machine | You choose it | Straight up and down |
| Balance needed | Least | Most, each arm alone | Little, one bar on rails |
| Spotter | Not needed | Helpful when heavy | Not needed, with safety stops |
| Best for | Sets close to failure, drop sets | Range of motion, one arm at a time | Heavy loads, small weight jumps |
A tie for growth: machines and free weights build muscle equally, but strength carries over best to the equipment you train on (Haugen 2023). Use the machine for hard sets without a spotter, and dumbbells if you want a stronger free-weight press.
Sets, reps and progression
Stop each set 0 to 2 reps short of failure. Sets taken close to failure build muscle across a wide range of reps (Schoenfeld 2021), and the machine lets you get there safely without a spotter.
Add reps first. When every set reaches 12 clean reps, move up one pin and drop back to 8. The press works the front delts most, so pair it with lateral raises for the side delts and a rear delt exercise.
Common mistakes
-
Seat too lowThe handles start above your shoulders and the bottom of the rep is gone. Raise the seat until they start at shoulder height.
-
Arching off the padYour chest takes over and it becomes an incline press. Brace your abs and keep your back and head on the pad.
-
Shrugging before you pressYour traps start the rep and your neck tightens. Start with your shoulders relaxed and let them rise only as your arms go up.
-
Elbows behind your bodyThe front of the shoulder takes the strain. Keep your elbows slightly in front of your torso, or switch to the neutral handles.
-
Dropping the weightThe stack bangs and the lowering half of the rep is lost. Lower over 2 to 3 seconds without the plates touching.
Shoulder press machine variations
Questions people ask
What muscles does the shoulder press machine work?
The front delts most, with the side delts, triceps and upper chest helping. The rear delts do little; machine presses drew less rear delt activity than barbell presses (Coratella 2022).
How to adjust shoulder press machine?
Set the seat so the handles start at shoulder height when you sit back on the pad. Raise the seat if they start above your shoulders, lower it if they start below. Write the notch in your log so every session starts the same.
How to grip shoulder press machine?
Wrap your thumbs around the handles and keep your wrists straight over your forearms. Neutral handles are easier on most shoulders and work the upper chest more; wide overhand handles shift some work to the side and rear delts (Coratella 2022).
Is shoulder press machine weight per arm?
On a pin-loaded machine, no. Both handles lift the same stack, so the pin number is the load for both arms, geared through the machine's cams and levers. On a plate-loaded machine with independent arms, each arm carries the plates on its side.
Does shoulder press machine work triceps?
Yes. The triceps straighten your elbows as you press and do more of the work near the top. The front delts still do the most.
Is the shoulder press machine better than dumbbell shoulder press?
Not for growth. A review of 13 studies found no difference in muscle growth between machine and free-weight training (Haugen 2023). The machine lets you train close to failure without a spotter; dumbbells build a stronger free-weight press.
How much weight should I use on the shoulder press machine?
For 10 reps, the median on Gravitus is 95 lb (42.5 kg) for men and 37.5 lb (17 kg) for women. The strongest quarter lifts 130 lb (60 kg) and 50 lb (22.5 kg) or more.
Log every set and see your percentile on every lift, shoulder press machine included.
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