Machine Shrug
What Is the Machine Shrug?
Machine Shrug is an isolation exercise that primarily targets the back, specifically the upper trapezius, with the forearms working to hold the handles and the rhomboids assisting as the shoulder blades rise. It is a beginner-level movement: the machine sets the path of the handles, there is nothing to balance, and the only real skill is keeping the arms out of it.
The version shown here is a standing, plate-loaded lever machine with a handle beside each hip, gripped with the palms facing in. That puts the load where dumbbells hang, at your sides rather than against the front of your thighs, so nothing stops your shoulders short at the bottom of the rep. Unlike dumbbells, the weight comes from plates loaded onto the machine, so it can go well past the heaviest pair on the rack in small jumps, and the levers rest on stops you reach with a short squat instead of being pulled off the floor. The trade is that the machine decides the path, so it trains less of the steadying work that free weights ask for.
Shrugs are accessory work. They usually sit at the end of a back, shoulder or pull session, after the rows and deadlifts, and one or two sessions a week is enough to grow the traps. Bodybuilders use them for upper-back thickness, and the machine is a common choice once dumbbells get too heavy to pick up and hold comfortably. No sport contests the shrug itself, so there is little reason to grind it like a max-effort single.
The upper trapezius does most of the work, but it is not the only muscle lifting the shoulder blade: in a laboratory study that recorded the shoulder-blade muscles with surface and fine-wire electrodes, a shrug with a weight held at the sides produced high upper trapezius activity and more levator scapulae and rhomboid major activity than a shrug with the arms overhead. Because the range is short, how well you finish each rep matters more than the number of plates on the machine, and a deliberate one-second hold at the top is worth more than load you can barely move. Anyone who cannot feel the traps working should start with the Bodyweight Shrug or the Hanging Scapular Shrug to learn what moving the shoulder blade on its own feels like, then build up with a light Dumbbell Shrug.
Muscles Worked
- Upper Trapezius
- Primary
- Brachioradialis
- Medium
- Flexor Carpi Radialis
- Medium
- Flexor Carpi Ulnaris
- Medium
- Rhomboid Major
- Medium
Instructions
- Load the same plates on both sides of the machine and check that the levers are resting on their stops.
- Step in between the handles and stand with your feet about hip-width apart, so a handle sits beside each hip.
- Bend your knees and hips with a flat back, grip the handles with your palms facing in, and stand up tall so the levers lift off the stops and your arms hang straight at your sides.
- Set your posture before the first rep: chest up, ribs stacked over your hips, chin level and your head in line with your spine.
- Brace your midsection and let your shoulders settle all the way down, keeping your knees still and your arms straight.
- Pull your shoulders straight up toward your ears as high as they will travel, without bending your elbows or pushing your head forward.
- Hold the top for a second without rolling your shoulders forward or back.
- Lower your shoulders under control until they are fully down and you feel the stretch in your traps, without letting the levers touch the stops.
- Repeat for the desired number of repetitions, then bend your knees and hips to set the levers back on their stops before letting go.
Common Mistakes
Rolling the Shoulders
Circling the shoulders forward or back adds travel that the handles, which pull straight down, never resist, so shrug straight up and straight back down.
Bending the Arms
Pulling with the elbows turns the lift into a short upright row and takes work off the traps, so keep the arms straight and treat your hands as hooks.
Bouncing the Knees
Dipping and driving with the legs to start each rep lets momentum lift the handles and hides how much weight the shoulders are actually moving.
Leading With the Chin
Jutting the head forward or tipping it back to meet the shoulders makes the range look longer while moving the effort into the neck.
Cutting the Bottom Short
Keeping the shoulders part way up between reps shortens a range that is only a couple of inches to begin with and removes the loaded stretch at the bottom.
Letting Go Before the Levers Are Down
Releasing the handles while standing drops the full load onto the frame, so bend back down and set the levers on their stops first.
Injuries
Machine Shrug is a low risk exercise when performed with proper technique. The range is short, the load hangs at your sides on a path the machine sets, and nothing passes over your head, so the risk comes mostly from loading it heavier than your neck and grip can control.
The neck is the first place it shows. Pushing the chin forward, tipping the head back or dipping it to meet the shoulders moves the work into small neck muscles instead of the traps, and usually turns up as stiffness the next day, so keep the head level and let the shoulder blades do the travel. The grip is the second limit: heavy sets end at the hands long before the traps are done, so use lifting straps once your grip gives out first, and end the set rather than holding on with half a grip.
The parts of the set specific to this machine are the start and the finish. Load the same plates on both sides, bend your knees and hips with a flat back to reach the handles, and stand up with your legs rather than yanking the levers off the stops with your back. At the end of the set, bend back down and set the levers on their stops before you let go, because handles released in mid-air drop the full load onto the frame and toward your feet. Jerky, bouncing reps are what turn a controlled shrug into a neck or shoulder complaint.
If holding a loaded machine is uncomfortable, build up with the Bodyweight Shrug or a light Dumbbell Shrug, and progress by adding a pause at the top before adding plates. Stop the set for sharp pain at the base of the neck, pinching at the top of the shoulder, or tingling or numbness running down an arm, and have any of those looked at before loading the movement again.
Frequently Asked Questions
- Q: What does the machine change compared with dumbbell or barbell shrugs?
The handles sit beside your hips like dumbbells, but the load is plates on a lever that rests on stops, so you can go heavier in small jumps without pulling a heavy weight off the floor or the rack. The machine also sets the path of the handles, which leaves less steadying work than free weights. All of them train the same muscle.
- Q: How high should my shoulders go?
As high as they will travel with straight arms, a level head and no lean back, which is only a couple of inches for most people. A one-second hold at the top is a better use of the set than forcing extra height by nodding or leaning.
- Q: Does it matter that the handles put my palms facing in?
Mostly for comfort. With the palms facing in, the arms hang naturally at your sides and the wrists stay straight, while the traps lift the shoulder blades the same way whichever way the palms face.
- Q: Should I use lifting straps?
Use them once your grip gives out before your traps do, which happens quickly on a machine that loads this heavily. Keeping some lighter sets strapless leaves the grip training in.
- Q: How many sets and reps should I do?
Two to four sets of 8 to 15 reps at the end of a back or shoulder session is the common practice, with a full second of squeeze at the top of every rep. If you cannot hold that pause without your posture changing, take a plate off.