What muscles does the machine shoulder press work?

It mainly works the front deltoid, with the side deltoid and triceps as the main helpers. The upper trapezius joins at the end of the press. Seated with the back supported and the handles guided, the trunk and shoulder stabilizers do very little, so nearly all the fatigue lands on the shoulder itself.

How do you set the seat height on the machine shoulder press?

Adjust the seat until the handles sit at shoulder height or just below, with the elbows near 90 degrees in the starting position. If the handles start too high, the range shortens and you lose the most useful part; if they start too low, the shoulder begins from a strained position. Rest your whole back on the pad and your feet on the floor before pressing.

Machine or dumbbell shoulder press: which one should you choose?

With dumbbells each arm stabilizes its own weight, which demands more control and builds more overall strength, but limits the load and tires the stabilizers first. The machine fixes the path and lets you add weight gradually without worrying about balance. For beginners, the machine teaches the pattern safely; with experience, dumbbells add what the machine does not ask for.

How many reps and how much weight to start with on the machine shoulder press?

A common range for learning the movement is sets of 10 to 12 reps with a load that leaves one or two reps in reserve. Start near the bottom of the stack, check that you can lower the handles to shoulder height and press up without arching the lower back, and add one plate per session as long as the technique stays the same.

Machine Shoulder Press

The machine shoulder press is a seated overhead press on guided handles, the simplest way to load the front deltoid with a fixed path and a weight stack that climbs in small steps.

SHOULDERS · PUSH

Machine Shoulder Press: how the movement is executed

How it is executed

Sit at the shoulder press machine.
Press the handles overhead until your arms are straight, then lower under control.

Muscles worked: Shoulders
Primary muscle: Front delt
Equipment: Machine
Movement pattern: Push
Difficulty: Intermediate
What it is for: HypertrophyStrength
Also known as: Machine overhead pressMachine military press

Watch the full tutorial

Common mistakes

Leaving the seat at the wrong height. If the handles sit well above your shoulders you start from a forced position and lose range. Set the seat so the handles line up with your shoulders.
Letting the shoulder blades come off the pad and arching to press. The machine fixes the path, so the compensation lands on the lower back. Keep the upper back on the pad and the ribs down.
Snapping the elbows into lockout at the top. Slamming into lockout under load stresses the joint and unloads the delt. Stop just short of full extension.

Frequently asked questions

What muscles does the machine shoulder press work?: It mainly works the front deltoid, with the side deltoid and triceps as the main helpers. The upper trapezius joins at the end of the press. Seated with the back supported and the handles guided, the trunk and shoulder stabilizers do very little, so nearly all the fatigue lands on the shoulder itself.
How do you set the seat height on the machine shoulder press?: Adjust the seat until the handles sit at shoulder height or just below, with the elbows near 90 degrees in the starting position. If the handles start too high, the range shortens and you lose the most useful part; if they start too low, the shoulder begins from a strained position. Rest your whole back on the pad and your feet on the floor before pressing.
Machine or dumbbell shoulder press: which one should you choose?: With dumbbells each arm stabilizes its own weight, which demands more control and builds more overall strength, but limits the load and tires the stabilizers first. The machine fixes the path and lets you add weight gradually without worrying about balance. For beginners, the machine teaches the pattern safely; with experience, dumbbells add what the machine does not ask for.
How many reps and how much weight to start with on the machine shoulder press?: A common range for learning the movement is sets of 10 to 12 reps with a load that leaves one or two reps in reserve. Start near the bottom of the stack, check that you can lower the handles to shoulder height and press up without arching the lower back, and add one plate per session as long as the technique stays the same.

Variations and substitutions

Arnold PressDumbbell Landmine PressBarbell Seated Band Shoulder PressResistance band Barbell Shoulder PressBarbell Dumbbell Shoulder PressDumbbell Smith Machine Shoulder PressSmith machine Seated Behind-the-Neck Barbell PressBarbell Single-Arm Dumbbell Shoulder PressDumbbell

Routines that program it

Six-day push/pull/legs routine3 sets a week

Shoulders exercises Machine exercises Estimated 1RM calculator Back to the library

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Glossary and calculators

Movement patternA movement pattern is the mechanical family an exercise belongs to: horizontal push, vertical push, horizontal pull, vertical pull, knee-dominant, hip-domina...Compound exerciseA compound exercise moves more than one joint and loads several muscles at once — the squat, the deadlift, the bench press, the row.Client capacityHow many clients you can handle

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Machine Shoulder Press

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