Shoulder pain during the overhead press usually traces back to soft tissue getting pinched, squeezed, or overloaded in the narrow space between your upper arm bone and the bony shelf of your shoulder blade. That space, called the subacromial area, shrinks every time you push weight overhead, and when the structures inside it are irritated, weak, or structurally crowded, pain follows. But the overhead press is not inherently dangerous, and the reasons it hurts vary enough from person to person that understanding the possibilities makes a real difference in whether you can fix the problem or need to see someone about it.
The Subacromial Squeeze
The most frequent cause of overhead pressing pain is subacromial impingement, where the rotator cuff tendons and the bursa (a fluid-filled cushion) get trapped between the head of your humerus and the acromion, a bony projection at the top of your shoulder blade. In impingement, patients experience painful entrapment of that soft tissue whenever they elevate the arm, driven by a structural narrowing in the subacromial space.1PubMed Central. Impingement Syndrome of the Shoulder Every rep of a shoulder press moves your arm through the zone where this narrowing is most pronounced, which is why the pain often spikes partway through the lift rather than at lockout.
Impingement is not one single injury. It is a category. The pinched structure might be a rotator cuff tendon that is inflamed, partially torn, or just swollen from overuse. It might be the bursa itself, thickened from repeated friction. In many lifters, it is a combination of both. The reason this matters is that rest alone sometimes resolves bursal irritation within a few weeks, while a tendon issue can become chronic if the underlying cause, usually poor mechanics or structural crowding, is not addressed.
Your Bone Shape Might Be Part of the Problem
Not everyone has the same architecture under the skin. The acromion comes in several shapes: flat, curved, and hooked. A flat acromion leaves the most room for the rotator cuff to move freely. A hooked acromion closes that space down, increasing the chance that overhead movements will pinch tissue. Research consistently shows that acromion shape differs between people with rotator cuff tears and those without, and that a large lateral extension or a downward-sloping acromion is associated with full-thickness supraspinatus tears, likely because of compression of the tendon between the humeral head and the acromion.2PubMed Central. Acromion and glenoid shape: Why are they important predictive factors for the future of our shoulders?
Bony spurs add another layer. These small outgrowths on the underside of the acromion further narrow the subacromial space. In one imaging study of healthy individuals, the curved acromion shape was the most common type, and spurs appeared more frequently on the right side than the left.3PLoS ONE. Distribution and analysis of subacromial spurs and the relationship with acromial classification and angle in healthy individuals A separate study found that a specific lateral spur shape, called a birdbeak, roughly doubled the odds of shoulder pain and disability.4PubMed Central. Radiographic findings in patients suspected of subacromial impingement syndrome in relation to shoulder pain and disability You cannot change your bone shape in the gym. But knowing that anatomy plays a role helps explain why two people doing the exact same pressing program can have completely different experiences, and why someone whose shoulder hurts during every overhead press may need to accept that the movement will always need modification.
When Your Shoulder Blade Does Not Do Its Job
Your shoulder blade is supposed to rotate, tilt, and glide along your rib cage in sync with your arm bone as you press overhead. This coordinated movement is what allows the subacromial space to stay relatively open during the lift. When the scapula does not track correctly, a problem called scapular dyskinesis, that space closes prematurely and the rotator cuff takes the hit.5PubMed Central. Scapular Dyskinesia, the forgotten culprit of shoulder pain and how to rehabilitate
Weakness in the muscles that stabilize the scapula, particularly the serratus anterior, lower trapezius, and middle trapezius, can lead to abnormal stress on the front of the shoulder capsule, increased rotator cuff compression, and reduced overall neuromuscular performance of the shoulder.6PubMed Central. The role of the scapula If you watch yourself press in a mirror and one shoulder blade wings out, hikes dramatically, or dumps forward at the top, that is a visible sign the stabilizers are not doing their part. The fix is not simply pressing lighter. It is training the scapular muscles directly, a topic covered further below.
Behind the Head Pressing and External Rotation Limits
Pressing a barbell behind your head has a reputation for being hard on the shoulders, and the research backs this up for certain people. A study comparing front and behind-the-head overhead press kinematics found that the behind-the-head version forces the shoulder into a combined abducted and externally rotated position at the bottom of the movement. This was the only point during overhead pressing where the dynamic range of motion actually exceeded the passive range of motion found during testing.7Journal of Sport and Health Science. Overhead shoulder press – In-front of the head or behind the head? In practical terms, your shoulder is being cranked into a position at the bottom of the rep that goes beyond what it can comfortably reach when relaxed. The researchers noted that this was particularly an issue for males with limited external rotation, and recommended assessing range of motion before including behind-the-head technique in a program. Front pressing, by contrast, did not bring the shoulder close to its passive limits for external rotation in either men or women.
If behind-the-head pressing hurts you but front pressing does not, limited external rotation is a likely explanation. And if both versions hurt, the problem is probably not just the pressing plane. It is more likely impingement, scapular dysfunction, or a structural issue that narrows the subacromial space regardless of hand position.
How Grip Width and Equipment Choice Matter
Grip width changes what your shoulders have to do during the press. A study of resistance-trained men found that narrower grips increased both the load lifted and shoulder range of motion, while wider grips increased lateral forces on the bar and reduced stress at the elbow. Narrower grips, on the other hand, reduced the forces that the shoulder had to produce.8Sports Biomechanics. The impact of grip width on kinetics and kinematics in the shoulder press among resistance-trained men This creates a trade-off: a wider grip may feel more comfortable for your shoulders because the net forces at the shoulder joint are lower, but it moves the load more to the elbows and changes how the bar travels. If shoulder pain is your issue, experimenting with grip width is one of the simplest variables to adjust.
Equipment type also plays a role. Dumbbells allow your wrists and elbows to find a natural path, whereas a barbell locks you into a fixed grip. Comparing implements, researchers have found that dumbbells produce greater front deltoid activity compared to kettlebells during overhead pressing.9PubMed Central. Stability of Resistance Training Implement alters EMG Activity during the Overhead Press A separate study comparing dumbbells, standard kettlebells, and bottom-up kettlebells found similar patterns for the deltoid, but notably the bottom-up kettlebell, held upside down with the bell above the handle, drove higher serratus anterior activity than both other implements.10Journal of Bodywork and Movement Therapies. Electromyographic analysis of shoulder-complex muscles performing overhead presses with dumbbell, kettlebell, and bottom-up kettlebell The serratus anterior is one of the key scapular stabilizers, so if your pain stems from poor scapular control, unstable implements may actually be therapeutic at lighter loads, forcing those stabilizers to work harder.
The Barbell Military Press and Scapular Kinematics
The standing barbell military press has a biomechanical profile that distinguishes it from simply raising your arm overhead. Researchers tracking shoulder and scapular motion found that the military press involved greater scapular upward rotation and posterior tilt compared to basic shoulder flexion with or without weights, along with greater clavicular retraction and elevation.11Journal of Shoulder and Elbow Surgery. Kinematic features of the military press and its functional significance Greater upward rotation and posterior tilt are generally favorable for subacromial clearance, because those scapular positions help open the space rather than close it. This may explain why a standing military press sometimes feels better than a seated machine press, where your torso is locked in place and your scapula has less freedom to rotate naturally. If you have been pressing exclusively on a machine or Smith machine and wondering why it hurts, switching to a free-standing barbell or dumbbells could allow your scapula to move the way it wants to.
Muscle Imbalances That Load the Wrong Structures
The rotator cuff is a group of four small muscles whose main job during pressing is not to push weight but to keep the humeral head centered in the socket. If these muscles are weak relative to the larger deltoids and pecs doing the pushing, the humeral head migrates upward as you press, eating into the subacromial space. A systematic review of overhead athletes found that an imbalance between external rotation and internal rotation strength was a risk factor for shoulder injury, with one study reporting a relative risk of roughly 2.5 for athletes with this imbalance. Supraspinatus weakness was independently flagged as a risk factor as well.12Therapeutic Advances in Musculoskeletal Disease. Are muscle weakness and stiffness risk factors of the development of rotator cuff tendinopathy in overhead athletes: a systematic review
Many lifters who press frequently but rarely do face pulls, band pull-aparts, or external rotation work develop exactly this kind of imbalance over time. The pressing muscles get stronger; the rotator cuff does not keep up. The result is a shoulder that generates plenty of force overhead but lacks the stabilization to do so safely. If your pressing pain has crept in gradually rather than appearing from one specific incident, an imbalance like this is high on the list of likely causes.
Overuse, Volume, and Programming Errors
Shoulder pain from pressing is not always about a single faulty rep. Often it is cumulative. Up to about a third of documented resistance-training injuries occur at the shoulder complex, and the factors that increase injury risk include joint and muscle imbalances along with improper attention to technique.13The Journal of Strength & Conditioning Research. Shoulder Injuries Attributed to Resistance Training: A Brief Review A rapid jump in pressing volume or load without adequate adaptation time is a classic setup for tendon overuse injuries.
A related condition worth knowing about is insertional tendinopathy of the pectoralis minor, sometimes called “bench-presser’s shoulder.” Though most commonly linked to bench pressing, it involves pain and tenderness near the coracoid process, a small bony bump on the front of your shoulder, worsened by pressing movements. Training errors, poor technique, and rapid increases in load or frequency are all contributing factors.14Journal of Strength and Conditioning Research. The Contribution of Muscular Fatigue and Shoulder Biomechanics to Shoulder Injury Incidence During the Bench Press Exercise: A Narrative Review If your shoulder pain lives more in the front-and-deep territory rather than on top, and it flares with both overhead and horizontal pressing, pec minor tendinopathy is worth considering.
Modern resistance training may also be mismatched with how the shoulder evolved to function. A perspective paper argues that many popular exercises emphasize high-load pushing in patterns that impose shear forces on the shoulder while reducing the engagement of the scapular and trunk stabilization systems that evolved to protect it.15PubMed Central. Shoulder Complex Dysfunction Through an Evolutionary Lens: The Need for Closed Kinetic Chain Loading in Upper Extremity Program Design The practical takeaway is that a pressing-heavy program with little pulling, carrying, or hanging may leave the protective mechanisms of the shoulder underused and the vulnerable structures overloaded.
When Pain Points to Something Structural
Not all pressing pain is soft-tissue irritation that will resolve with rest and technique fixes. Superior labral tears, commonly referred to as SLAP lesions, involve damage to the cartilage ring that deepens the shoulder socket. These injuries are particularly common in overhead athletes and are known to be a surgical and rehabilitation challenge because of the complex mechanics involved.16Physical Therapy in Sport. Superior labrum anterior to posterior (SLAP) rehabilitation in the overhead athlete A SLAP tear typically produces a deep, catching pain, sometimes accompanied by clicking or a feeling of instability, rather than the diffuse ache of impingement. If your pain is sharp, positional, and accompanied by mechanical symptoms like clicking or locking, it is worth getting an imaging assessment rather than continuing to work around it.
What Actually Helps
For impingement-related pressing pain, the evidence supports two complementary approaches: strengthening the scapular stabilizers and building rotator cuff capacity. A randomized trial of overhead athletes with impingement found that progressive resistance exercises combined with manual therapy produced greater improvements in scapulohumeral muscle strength than conventional exercises alone, with the largest gains seen in the anterior deltoid, supraspinatus, and upper trapezius.17PubMed Central. Progressive Resistance Exercises plus Manual Therapy Is Effective in Improving Isometric Strength in Overhead Athletes with Shoulder Impingement Syndrome: A Randomized Controlled Trial In other words, carefully structured loading of the shoulder muscles, combined with hands-on treatment, outperformed general corrective exercise.
Scapular stabilization exercises on their own also show promise, though with nuance. A controlled trial found that scapular stabilization-based exercise therapy significantly improved shoulder range of motion, forward shoulder posture, and thoracic curvature in impingement patients, though pain reduction specifically was similar between the exercise group and the control group.18PubMed Central. The effects of scapular stabilization based exercise therapy on pain, posture, flexibility and shoulder mobility in patients with shoulder impingement syndrome: a controlled randomized clinical trial The takeaway is not that scapular work fails to help with pain but that the mechanism may be indirect: better scapular mechanics allow the shoulder to operate in a more favorable position, which over time reduces the irritation that causes pain during pressing.
Practically, a rehabilitation approach for pressing-related shoulder pain often includes temporarily reducing overhead pressing volume or load, adding external rotation and scapular stabilization work two to three times per week, addressing thoracic spine mobility if a rounded upper back is limiting overhead reach, and gradually reintroducing pressing in a pain-free range before building back to full range and heavier loads. Switching from a barbell to dumbbells can help during this period, since dumbbells let your shoulders find a less constrained path.
Landmine Presses and Other Workarounds
If overhead pressing consistently hurts regardless of technique adjustments, it does not mean you have to abandon pressing entirely. The landmine press, where you press a barbell anchored at one end on the floor at roughly a 45-degree angle, keeps your arm below full overhead elevation and typically stays well within comfortable range for people with impingement. The reduced range means less subacromial compression. Similarly, a high-incline dumbbell press at around 60 to 75 degrees provides most of the deltoid stimulus of a vertical press while keeping the arm out of the impingement zone. Some people find that a neutral grip, palms facing each other, reduces stress compared to a pronated grip, since it allows the humerus to externally rotate slightly and open the subacromial space.
Single-arm pressing with dumbbells or kettlebells is another useful alternative. When you press with one arm, your trunk has to stabilize asymmetrically, which appears to increase demand on the scapular stabilizers. The bottom-up kettlebell press, mentioned earlier for its serratus anterior activation, doubles as both a training tool and a self-assessment: if you cannot stabilize the bell at light weight, your scapular control needs work before you add heavier overhead loading. Treat the exercise as a diagnostic as much as a builder.