The behind the neck press isn't dangerous by default, but it isn't for every shoulder. The bottom of the rep puts your arm out to the side and rotated back, the position a 1993 study of lifters with unstable shoulders called "at-risk." The one study that measured shoulder range during the lift calls it safe if your shoulder has the range for that position. Two EMG studies found it works your rear delts harder and your chest less than a front press. If you can't reach the bottom pain-free with an upright torso, press in front. Other lifts cover everything it does.
I filmed a reel pressing behind the neck with the caption "Don't listen to someone telling you these are dangerous." In the reel I'm standing, with a wide grip, lowering the bar to about ear level. The on-screen text promised "3D delts and perfect posture," and the caption said these are "only dangerous if you're an ego lifter." Here's the long version with the studies attached. "Perfect posture" doesn't hold up, and the ego-lifter line misses the bigger risk, so I'll correct both.
Is the behind the neck press bad for your shoulders?
Not for every shoulder. The risk sits in the bottom position, and whether your shoulder can reach it matters more than the weight on the bar.
Kolber's 2010 review in the Journal of Strength and Conditioning Research found that up to 36% of documented lifting injuries happen at the shoulder, with muscle imbalances and poor technique named as risk factors. Most of that research looked back at injuries after the fact, so the review couldn't say who will get hurt.
The bottom of a behind the neck press puts your upper arm out to the side and rotated back. Gross and colleagues' 1993 study in the American Journal of Sports Medicine looked at 23 shoulders in 20 lifters with anterior instability. Every one had pain with the arm abducted and externally rotated, which the authors called the "at-risk" position. 13 shoulders recovered with rehab and a technique change that avoided that position; the other 10 needed surgery. One honest limit: the paper names the position, not the lift. Linking it to the bottom of a behind the neck press is an inference, a short step but still a step.
The study that measured the lift itself is McKean and Burkett's 2015 paper in the Journal of Sport and Health Science. They filmed 33 people pressing seated, in front of and behind the head, with 3D motion capture. Shoulder range stayed inside each person's passive range on every measure but one: external rotation, in the men, behind the head. Their conclusion cuts both ways. Build passive range before you press behind the head. And for people with normal trunk stability and ideal shoulder range, both presses are safe.
So about that caption. Load is part of it, because a weight you can't control takes your technique with it. But McKean's finding is about range, not load, and the paper's fix is more passive range, not less weight. If your shoulder can't reach the bottom, a light bar asks for the same range a heavy one does. The better line: the risk depends on whether your shoulder reaches the bottom, and ego loading makes a bad position worse.
What muscles does the behind the neck press work?
Your delts and triceps, with the upper traps helping. Compared with a front press, the behind the neck shoulder press moves work toward your rear delts and away from your chest.
Two EMG studies from the same lab at the University of Milan compared the presses. EMG measures a muscle's electrical activity during a lift.
- Coratella 2022 in Frontiers in Physiology tested 8 competitive bodybuilders. On the way up, the barbell press behind the neck showed more side delt (effect size 3.68) and rear delt (9.00). The front press showed more chest (3.11). Upper traps showed no difference.
- Padovan 2025 in the Journal of Human Kinetics tested 14 trained men at their 8-rep max. On the way up, the front press showed more front delt (1.03) and chest (0.70). On the way down, the behind the neck press showed more rear delt (1.11), upper trap (0.72), and triceps (2.01). The side delt differed only in where the activity sat inside the muscle, not in how much there was.
They agree on more rear delt and less chest. They disagree on the rest: Coratella found more side delt behind the neck and Padovan didn't, and Padovan found more front delt in the front press, while Coratella found more front delt behind the neck on the way down. A rear-delt effect size of 9.00 from eight people is also a number to hold loosely.
The bigger catch: EMG measures activity, not growth. Vigotsky and colleagues' 2018 review in Frontiers in Physiology warns that growth and strength conclusions drawn from EMG comparisons are "frequently unsubstantiated and unwarranted." And no study has compared muscle growth between the behind the neck press and the front press.
Does it give you "3D delts and perfect posture"?
Partly on the delts, no on the posture. That headline was stronger than the data.
"3D delts" has some backing: both EMG studies show more rear-delt activity behind the neck, and most pressing leaves the rear delt out. But that's activity in a set, not growth over months. Width is a separate job anyway. The side delt caps the outside of your shoulder, and lateral raises are what build width, not any press.
"Perfect posture" has nothing behind it. No study has measured a posture change from this lift, and posture may matter less for shoulder pain than you'd think. Barrett and colleagues' 2016 systematic review in Manual Therapy reviewed 10 studies and found moderate evidence of no difference in upper-back rounding between people with and without shoulder pain.
The same review found strong evidence that your shoulder reaches further overhead when you sit or stand tall than when you slump. Those were single-session studies, so they say nothing about long-term change. But they explain why posture matters during this lift: a rounded upper back takes range away from your shoulder, and the behind the neck press needs all you have. McKean saw it too, with the behind-the-head press starting from a more rounded upper back. Stand tall to press. Don't press to stand tall.
How do you know if your shoulders can handle it?
Test the bottom position with no weight first. If you reach it upright and pain-free, try the lift. If you can't, skip it.
This is a coaching screen, not a validated test. Nobody has studied it.
- Take an empty bar or a PVC pipe with your hands well outside your shoulders.
- Stand tall, ribs down, head neutral, eyes forward.
- Lower the bar behind your head to about ear level.
- Check for three fails: pain anywhere in the shoulder, your head pushing forward to make room, or your lower back arching to get there.
If you pass, start light. If you fail, press in front, and retest after some mobility work, since McKean's advice was to build passive range first.
Some shoulders should skip it outright. If you've ever dislocated a shoulder or been told you have anterior instability, the bottom of this press is the position Gross's lifters couldn't tolerate. Same if the bottom position hurts.
Rotation range and rotator-cuff strength also show up in lifters with shoulder pain. Kolber's 2017 study compared 24 lifters with impingement against 31 without: the impingement group had less rotation range and weaker external rotators and lower traps. In Kolber's 2014 study of 46 lifters, external-rotator training went with fewer impingement signs. Those are associations, not proof, and neither study looked at this press. Still, if you press behind the neck, keep some external-rotator work in your week.
How to do the behind the neck press (form + sets)
Wide grip, lower to about ear level, head neutral, press straight up. Treat it as a second press: 3 sets of 8 to 12 reps, each stopped 1 to 2 reps short of failure.
The rep
Set your hands well outside your shoulders, wide enough that your forearms sit about vertical at the bottom. Stand tall with your ribs down. Lower the bar to about ear level, not down to your traps; that's where the bar stops in the reel. Going lower asks for more of the arm position Gross's lifters couldn't tolerate, and no study shows the extra range buys you anything. Keep your head still. If it has to push forward to clear the bar, you're past your range. Then press straight up to lockout.
Standing, seated, and Smith machine versions all work. Seated takes your lower back out of it and lets you load more: Saeterbakken and Fimland's 2013 study of 15 men found the seated dumbbell press allowed about 10% more load than standing. None of the three changes where your shoulder goes at the bottom, so the screen still applies.
Sets, reps, and progression
Run 3 sets of 8 to 12 reps, each stopped 1 to 2 reps short of failure. That's the default baseline I teach, and it fits here for a simple reason: there's no point grinding heavy singles in the one position your shoulder is least sure about. The full case for where to stop a set is in how close to failure to train.
Write your reps down every session. Add about 5 lb only when every set reaches 12 reps at 1 to 2 reps in reserve. Go by the log, not by how light the bar feels. And if the bottom position starts to hurt, go back to the front press. A pressing variation isn't worth a shoulder.
Behind the neck press vs front press: which should you do?
Do the front press. Add the behind the neck press as a second press only if your shoulders pass the screen and you want more rear-delt work from your pressing.
The front overhead press stays the anchor. It kept every shoulder measure inside passive range in McKean's study, and nobody has shown the behind the neck version builds more muscle. If your front press has stalled, start with how to increase your overhead press. If you fail the screen, you miss nothing: a front press, lateral raises, and face pulls or reverse flyes cover every muscle the behind the neck press works.
I lift four days a week on a Push/Pull/Legs/Upper split, around a full-time job as a software engineer. A split like that gives you two pressing days. The front press leads one of them. If your shoulders pass the screen, the behind the neck press can go on the other, after your main press. That week, with the set-and-rep rule and the progression rule built in, is written out in The Momentum Method.
So here's the caption I'd write now: don't let someone scare you off the behind the neck press, and don't let a reel talk you into it. Test the bottom position first.