Muscles worked
The dumbbell shrug mainly trains the upper part of your trapezius, helped by the levator scapulae, a smaller muscle running from your neck to your shoulder blade. Your forearms work on the grip all set. Unlike the barbell version, the weights hang at your sides rather than in front of your thighs, so the pull runs straight down through your shoulders and many people find it easier to stand tall. Each side carries its own dumbbell, so you quickly see if one shoulder lifts less than the other.
Common mistakes
- Rolling your shoulders. Circling them backwards at the top adds nothing and makes the weight harder to control. Lift straight up and lower straight down.
- One side lifts higher than the other. The stronger side often races ahead. Check in a mirror that both shoulders reach the same height, and use lighter dumbbells if one side cannot keep up.
- Your shoulders never come all the way down. Turning the rep around early trains only the top bit. Let them sink until your arms hang relaxed and you feel a light stretch across the top of your shoulders, then lift from there.
Variations and alternatives
- The barbell shrug when the dumbbells are no longer heavy enough, as a bar loads heavier and in smaller steps.
- The machine shrug when you want to go heavy without balancing the weights.
- The farmer's walk trains your traps and grip as you walk with heavy dumbbells.
Sets and reps
10 to 15 reps over three or four sets suits most people, with a one second pause at the top of every rep. For endurance, 15 to 20 reps works well, and for really heavy sets of few reps a barbell is easier to load. The guide to sets and reps covers the ranges.
Dumbbells often go up in steps of two kilos or more, a big jump in such a short movement. So lengthen the pause at the top or add reps before moving up. That is progressive overload, even when the next dumbbell feels a long way off. If your neck hurts, and it is more than heaviness or fatigue, stop the exercise and let a doctor or physiotherapist take a look.