How to do the Single Arm Machine Shoulder Press
- Adjust the machine seat so handles are near your lower ears.
- Sit straight against the pad, with your feet flat on the floor.
- Push one handle up until that arm is fully extended overhead.
- Slowly lower it until your elbow reaches a comfortable deep bend.
- Finish all reps with one arm, then switch arms.
Full technique — 7 steps
- Adjust the seat so the handles start around lower ear to shoulder height.
- Sit tall with your back against the pad and feet flat on the floor.
- Grip both handles with palms facing forward and wrists straight.
- Set your shoulders down against the pad and tighten your stomach before starting the press.
- Press one handle upward until that arm is extended overhead, keeping the other handle still at the start.
- Lower the handle back to the starting range until your elbow reaches a comfortable deep bend.
- Complete all reps with one arm, then switch arms.
Common mistakes
- Seat set too low
- Shrugging shoulders during press
- Bouncing into the bottom
- Coming off the back pad
- Leaning the torso away from the working arm
- Stopping short of full overhead extension
Form cues
- Keep wrists straight
- Press without shrugging
- Stay against the pad
- Lower to full machine range
- Keep other handle still
Substitutes by equipment
Same muscles, same movement — pick the version you have the gear for.
Dumbbells
Barbell
No equipment
- Seated EZ Bar Overhead Press Harder
- Elevated Close Grip Pike Push-Up Harder
Weight plates
- Plate Overhead Press Same level
- Plate Curl to Press Same level
Where to start and where to go next
Same muscles, same movement. Too hard for now — step down; once it gets easy — step up.
- This exercise Single Arm Machine Shoulder Press
- Harder Dumbbell Shoulder Press
- Harder Barbell Overhead Press
Quick answers
What muscles does the Single Arm Machine Shoulder Press work?
Primary: Front delts 9/10. Also works: Side delts 6/10, Triceps 6/10, Upper chest 3/10, Traps 3/10.
When should I do the Single Arm Machine Shoulder Press in a workout?
Accessory. Goes after the main lifts. ≈ 10 min with rest.
How many sets and reps of the Single Arm Machine Shoulder Press?
Strength: 3–4 sets of 6–8 reps, rest 1 min 30 s, 2 reps in reserve. Muscle growth: 3–4 sets of 8–12 reps, rest 1 min, 2–3 reps in reserve. Endurance: 2–3 sets of 15–20 reps, rest 45 s, 3–4 reps in reserve.
What can I do instead of the Single Arm Machine Shoulder Press?
Dumbbells: Neutral Grip Dumbbell Shoulder Press, Alternating Dumbbell Shoulder Press. Barbell: Seated Barbell Overhead Press, Wide Grip Barbell Overhead Press. No equipment: Seated EZ Bar Overhead Press, Elevated Close Grip Pike Push-Up. Weight plates: Plate Overhead Press, Plate Curl to Press.
What is a harder version of the Single Arm Machine Shoulder Press?
Dumbbell Shoulder Press (Beginner), Barbell Overhead Press (Intermediate).
