Shoulder pain during bench press: 4 fixes, per 1,387 lifters

Bench press is the most pain-prone free-weight exercise in the gym

Of 1,387 recreational gym-goers surveyed, 53% reported pain during training — and bench press ranked among the top pain-causing exercises, alongside the squat and deadlift (Bernstorff et al., 2023). Free weights caused pain nearly twice as often as guided machines (19.9% vs 11.5%).

That gap isn't because barbells are dangerous. It's because most people bench with form that loads the shoulder joint instead of the chest.

The good news: shoulder pain during bench press is almost always mechanical. Fix the mechanics, fix the pain.

Free-weight exercises caused pain in 19.9% of gym-goers — nearly twice the rate of machine-based training.

— Bernstorff et al. (2023). Popular Gym Fitness Sport. Sports (Basel).

The muscles worked in bench press — and why the shoulder is involved at all

The bench press primarily trains the pectoralis major — the large fan-shaped muscle across your chest. Your anterior deltoid (front of the shoulder) and triceps assist. See the muscle anatomy for an interactive breakdown.

The shoulder joint itself is just the hinge. It shouldn't be the load-bearer.

When it becomes one, you feel it as a deep anterior (front) or posterior (back) shoulder ache — sometimes right at the bottom of the press, sometimes hours later. That's the joint absorbing force that your chest muscles should be taking.

The 4 form mistakes that cause shoulder pain during bench press

Mistake 1: Elbows flared at 90°

When your elbows point straight out to the sides, the upper-arm bone rotates outward and drives into the front of the shoulder capsule at the bottom of each rep. Tuck your elbows to about 45–75° from your torso instead. You lose no chest activation and immediately reduce shoulder stress.

Mistake 2: No shoulder blade retraction

Shoulder blade retraction means pulling your shoulder blades together and slightly down before you unrack. It creates a stable platform. Without it, your shoulder blades slide forward as you press, and the shoulder joint takes the load your chest should. Before every set: squeeze your shoulder blades together, hold them there, then press.

Mistake 3: Bar path drifting toward the neck

The bar should touch your lower chest — roughly nipple line — not your upper chest or collarbone. A high touch point angles the humerus (upper-arm bone) into the shoulder capsule. Record yourself from the side and check where the bar lands.

Mistake 4: Loading too heavy, too fast

Among Swedish subelite powerlifters, 70% were currently injured and the shoulder was one of the most commonly affected sites; injury onset during bench-press training and training frequency were among the factors associated with being injured (Strömbäck et al., 2018). Shoulder pain almost always shows up when load outpaces technique. If your form breaks down at a given weight, that weight is too heavy for your current technique.

70% of subelite powerlifters were currently injured, with the shoulder among the most commonly affected sites.

— Strömbäck et al. (2018). Prevalence and Consequences of Injuries in Powerlifting. Orthop J Sports Med.

Proper bench press form: a diagram in words

Here's the setup that removes shoulder load, step by step:

1. Feet flat on the floor, or on a step if your lower back arches excessively off the bench.
2. Grip just outside shoulder width — roughly where the knurling starts on a standard bar.
3. Retract your shoulder blades — pull them together and slightly down. Hold this throughout the set.
4. Unrack with straight elbows — don't let the bar drift toward you.
5. Lower to nipple line, elbows at 45–75° from your torso. Pause briefly at the chest.
6. Drive the bar straight up, not back toward your face.

Every rep starts with the shoulder blades locked back. If they slide forward mid-set, stop and reset — that's the moment shoulder pain starts.

For a fuller breakdown of bench technique, see smith machine bench press form — the principles for controlling the bar path apply to the free-weight version too.

Does dumbbell bench press form reduce shoulder pain?

Often, yes — and here's why. With dumbbells, your hands can rotate slightly inward at the top of the press (a semi-neutral grip — palms partially facing each other). That rotation takes the upper-arm bone out of the impingement zone it sits in during a fixed barbell grip.

If your shoulder pain is specifically at the top of the barbell press, switching to dumbbells temporarily while fixing your barbell form is a smart move. It lets you keep training the chest without repeatedly irritating the same structure.

And changing the implement costs you nothing in results. Over 8 weeks, a machine-based group and a free-weight group gained the same strength and the same muscle size, while joint discomfort dropped in both groups with no difference between them (Hernández-Belmonte et al., 2023). Put that together with the pain gap above and you have the whole case for the swap: the same chest stimulus on a path your shoulder tolerates better.

Machine and free-weight training built the same strength and size — and joint discomfort dropped in both groups.

— Hernández-Belmonte et al. (2023). Free-Weight and Machine-Based Training Are Equally Effective. Med Sci Sports Exerc.

Incline bench press vs flat: which is harder on the shoulder?

Incline bench press shifts more load onto the anterior deltoid — the front of your shoulder. For healthy lifters that's fine. For someone with existing shoulder pain, it can be more provocative than flat bench, because the steeper the angle, the more the shoulder has to stabilise the load at a less-than-ideal position.

If flat bench hurts, incline rarely fixes it. Start with the flat-bench form fixes above. Once those are solid and pain-free, add incline.

That said, some lifters find the opposite: the incline bar path naturally lands higher on the chest and pulls their elbows into a tighter tuck. If incline feels better for you, use that as your diagnostic — it tells you the bar path and elbow angle were the problem on flat.

When shoulder pain during bench press is a red flag — not a form problem

Most shoulder pain during bench press is mechanical and fixable. But two situations need a clinician, not a form cue.

Posterior shoulder instability is a condition where the back of the shoulder joint is loose or unstable. Athletes with this often describe a deep, vague ache provoked by push-ups and bench press — especially the blocking motion used by football linemen. The pain is hard to pinpoint and comes on without any single traumatic event. If this sounds like you, see a sports medicine doctor (DeFoor et al., 2025).

Pectoralis major rupture — a tear of the large chest muscle — is rare but serious. It presents as sudden, sharp pain and a popping sensation during a heavy press, often accompanied by visible bruising and a change in the chest's shape. Of 365 reported cases, 83% came from indirect trauma and 48% occurred during weight-training activities (Upadhyay et al., 2024) — the case report itself describes a gym trainer who tore his pec mid-press at around 100 kg. If you felt a pop and have weakness in shoulder adduction (pulling your arm across your body), stop training and get an MRI.

The rule of thumb: dull, mechanical, reproducible ache = form problem. Sudden pop, bruising, or deep instability = see a clinician.

48% of reported pectoralis major ruptures occurred during weight-training activities.

— Upadhyay et al. (2024). Rupture of Pectoralis Major Muscle. J Orthop Case Rep.

How many sets of bench press to do while managing shoulder pain

When your shoulder is irritated, volume is your first lever to pull — not load. Drop total weekly sets before you drop weight.

A practical protocol:
- Reduce to 2–3 sets per session at a weight where form stays perfect throughout.
- Keep rest between sets at 2–3 minutes — this isn't the time to rush.
- Add sets back one per week as long as you remain pain-free.

For healthy programming once your shoulder settles, see how many sets of bench press should i do — the evidence on optimal bench press volume applies once your shoulder can handle it.

Ego is the main risk factor here. Strömbäck et al. (2018) couldn't pin down why powerlifters get injured at all, but concluded that managing training loads and refining lifting technique are likely what matter most.