ProgreviaMachine shrug: proper form, muscles worked and common mistakes
Home › Exercises › Traps › Machine shrug
How to do it
Shrug the shoulders straight up toward the ears to load the upper traps, without rolling them. Hold briefly at the top and lower under control to a stretch; no momentum.
Muscles worked
Main muscle: traps. When it plans weekly volume, every set of this exercise counts in full for traps: the generator does not split it with other muscles.
Machine shrug vs low cable shrug: a guided path
In the machine shrug the path is already decided: you do not have to balance a cable or hold two dumbbells, just lift your shoulders against a guided resistance. The low cable keeps tension too, but the line of pull can drift slightly depending on where you stand. The machine locks you into a more repeatable track and lets you push close to failure with less risk of losing your posture. Depending on the model, the handles sit at your sides or the load rests on your shoulders, so check how yours works before choosing the weight.
It helps when your back is already fatigued and you do not want more deadlifts or free weights, or when you are learning the motion and want to think only about lifting your shoulders. It is also comfortable for long or drop sets at the end of a session, since changing the pin is quick. The trade-off is that the adjustments do not fit every body equally, and you lose some of the stabilization work.
A detail specific to this exercise: set the seat or height so you start with straight arms and a real stretch in the traps, and avoid pushing your head forward to follow the lift. Start with 10 to 15 reps and go heavier once you reach the top of that range with control.
Technical sheet
- Movement pattern
- Isolation
- Minimum level
- Beginner
- Technical demand
- Basic
- Fatigue it generates
- Low (0.6 out of 2.2)
- Risk if technique breaks down
- Low
These are the values the generator uses to decide where the exercise goes within the session.
Recommended sets and reps
As an isolation exercise, it works best in 3–4 sets of 10–15 reps with 0–2 RIR. Use it at the end of the session to add volume without systemic fatigue.
Common mistakes to avoid
- Rolling the shoulders in a circle when shrugging: the effective movement is vertical, straight up and down.
- Not adjusting the seat and pads to your body: your joint should line up with the machine's pivot.
- Using too much weight at the cost of technique and full range of motion.
What the research says
This is an isolation exercise. For beginners, adding it on top of compound lifts does not always help: in the trial by Gentil and colleagues (2013), people who only did lat pulldowns gained as much arm size as those who also did curls. It earns its place with experience, and for muscles the big lifts leave short.
You do not need to reach failure on every set: according to the meta-analysis by Refalo and colleagues (2023), stopping one or two reps short gives very similar growth. The generator prescribes it with RIR for that reason.
- Gentil P, Soares SR, Pereira MC, et al. Effect of adding single-joint exercises to a multi-joint exercise resistance-training program on strength and hypertrophy in untrained subjects. Applied Physiology, Nutrition, and Metabolism. 2013;38(3):341-344.
- Refalo MC, Helms ER, Trexler ET, Hamilton DL, Fyfe JJ. Influence of resistance training proximity-to-failure on skeletal muscle hypertrophy: a systematic review with meta-analysis. Sports Medicine. 2023;53(3):649-665.
How Machine shrug compares with other traps exercises
Of the 9 traps exercises in the catalogue, ranked from least to most fatiguing by the values the generator uses, Machine shrug is number 4 (tied with one other).
That makes it a good candidate for adding traps sets at the end of a session or in heavy weeks, when you want volume without extra fatigue.
With different equipment, the same movement pattern offers 5 alternatives, such as Band Y-raise, Band shrug and Low cable shrug.
| Exercise | Equipment | Fatigue | Technique |
|---|---|---|---|
| Band Y-raise | resistance band | Low (0.4 out of 2.2) | Basic |
| Band shrug | resistance band | Low (0.5 out of 2.2) | Basic |
| Low cable shrug | cable | Low (0.6 out of 2.2) | Basic |
| Machine shrug | machine | Low (0.6 out of 2.2) | Basic |
| Dumbbell shrugs | dumbbells | Moderate (0.7 out of 2.2) | Basic |
| Barbell shrugs | barbell | Moderate (0.7 out of 2.2) | Basic |
On a machine. In the meta-analysis by Haugen et al. (2023), with thirteen studies and 1,016 participants, there were no significant differences in muscle growth between training on machines and with free weights.
An isolation exercise. In the trial by Gentil et al. (2015), with untrained young men over ten weeks, the biceps curl and the lat pulldown were equally effective for gaining strength and size in the elbow flexors: isolation is not filler.
- Haugen ME, Vårvik FT, Larsen S, Haugen AS, van den Tillaar R, Bjørnsen T. Effect of free-weight vs. machine-based strength training on maximal strength, hypertrophy and jump performance: a systematic review and meta-analysis. BMC Sports Science, Medicine and Rehabilitation. 2023;15(1):103.
- Gentil P, Soares S, Bottaro M. Single vs. multi-joint resistance exercises: effects on muscle strength and hypertrophy. Asian Journal of Sports Medicine. 2015;6(2):e24057.
Related guide
The best back exercises: a zone-by-zone guide
Alternative exercises
More isolation exercises
Add it to your routine
Progrevia can generate a personalized routine that includes Machine shrug based on your level, goal and available days.
Build your traps workout
Generate a full routine with the emphasis on traps and Machine shrug among your preferred exercises. Free, no sign-up.
Not sure what to pick? The setup assistant walks you through it, one question at a time. Open the assistant
Frequently asked questions
What muscles does Machine shrug work?
Machine shrug mainly works the traps muscle group, plus synergist and stabilizer muscles depending on the variation.
How many sets of Machine shrug should I do?
Between 3 and 5 sets per session, adjusting the total weekly volume for traps to your level (about 10–20 sets per muscle per week).
How do I know the machine shrug is set up right for me?
At the start your arms should be straight and you should feel a slight stretch in your traps without your shoulders drifting forward. On the way up, your shoulders move toward your ears while your head stays still. If you feel a pull in your neck, or have to lean to reach the handles, adjust the height before adding load.
Progrevia builds gym routines from your own data: periodization, RIR and week-by-week progression. Free, no card.