Muscles worked
The machine shrug trains the upper part of your trapezius, with help from the levator scapulae. The machine handles the balance, and its handles are often easier to hold than a heavy bar, so your grip is less of a limit and nearly all your effort goes into the shrug itself. The movement is small, so what counts is that your shoulders travel all the way up and down, not the number on the stack.
Common mistakes
- The machine is set up wrong. Handles set too low can only be reached by bending, and set too high, the weight already rests at the bottom. Adjust the height so you stand or sit tall with straight arms and feel resistance from the start.
- Your shoulders go forward instead of up. As you tire, your upper back rounds and your shoulders get pulled towards the handles. Keep your chest up and your shoulder blades slightly back, so the lift goes straight upwards.
- The tempo gets too quick. On a machine it is easy to pump out reps without pausing. Hold for a second at the top and lower over about two seconds, so every rep looks the same.
Variations and alternatives
- The dumbbell shrug when you train with free weights, arms hanging at your sides.
- The Smith shrug also has a fixed path, but with a bar you can load in small steps.
- The prone YTW raise trains the middle and lower parts of your trapezius, a good complement since shrugs mainly work the upper part.
Sets and reps
With balance and grip taken care of, the machine suits both heavy and long sets. To build muscle, 8 to 15 reps over three or four sets works, and for heavier work you can drop towards 6 to 8 reps as long as your shoulders travel the full distance. The guide to sets and reps shows how to choose.
Make the pause at the top the condition for a rep to count, so your numbers mean the same every session. Once you reach the top of the range on every set that way, move up one step on the stack. That is progressive overload in an exercise where half reps make it easy to fool yourself.