Pec strain: a physio guide to a pulled chest muscle

Is it a pulled chest muscle or my heart?

Read this part even if you are sure it is the muscle.

You cannot settle that question at home, and neither can this page. If chest pain, pressure or tightness does not ease quickly when you rest, spreads to your arm, neck, jaw, stomach or back, or comes with sweating, feeling sick, feeling light-headed or being short of breath, call emergency services straight away, as this can be a heart attack. If it eases quickly and none of these happen, get medical advice the same day, and do not exercise again until you have been checked.

Three things make the question harder than it sounds. The first is that a chest wall you can press and hurt is not proof of anything.

Among 122 consecutive people who arrived at one emergency department with chest pain, after injury, fever and cancer had been screened out, 36 turned out to have costochondritis, a painful condition of the joints beside the breastbone. Within that group the acute heart attack rate was 6%, against 28% in everyone else (Disla and colleagues, 1994). Tenderness lowered the odds. It did not clear anybody.

The second is that a pec strain almost always has a moment attached to it. You were at the bottom of a heavy press, or a dip, or you grabbed a rail as you fell, and the pain started there and then. Pain that turns up while you are sitting still, or builds through a day with nothing behind it, has no such moment, and that is unexplained chest pain rather than a pulled chest muscle. The NHS puts sudden chest pain that does not go away, pain spreading into an arm, the neck, the jaw, the stomach or the back, and chest pain with sweating, sickness, light-headedness or breathlessness on its emergency list, and asks you to see a doctor about chest pain that comes and goes.

Having a moment attached to it does not settle the question the other way, and this is the part lifters get wrong most often. NICE calls chest pain anginal when it has three features: a constricting discomfort at the front of the chest, or in the neck, shoulders, jaw or arms, brought on by physical exertion, and eased by rest within about 5 minutes. All three present is what NICE calls typical angina, and two of the three is what it calls atypical angina, which goes down the same assessment route rather than out of it (NICE CG95, 1.3.3.1).

So counting your own features and coming up one short is not an exit, and "it came on at the bottom of the set and it went when I stopped" is not evidence for the muscle. It is the pattern a doctor is taught to treat as angina until it has been assessed. The same guideline tells clinicians not to read these symptoms differently in men and women, or in different ethnic groups, and says that not every acute coronary syndrome arrives with central chest pain as its main feature. Those categories belong to a clinician working with an examination and an ECG, which is the one thing that makes them useful, and it is also why none of them is a test you can run on yourself.

The third is the one both lifters and physios lean on hardest, and it is the weakest of the three. A pain you can bring on with a movement, and find again the same way, feels mechanical, so it feels settled. Look at what those movements are. Pulling a car door, pushing up out of a bath, carrying a bag on one side: every one of them is effort, and effort is the middle feature of the three above.

In a clinic, resisted adduction and internal rotation tell a physio which structure is painful. They do not tell either of us that nothing else is going on at the same time. Pain you can reproduce is a finding, never a rule-out, which is the tenderness research saying the same thing in a different way.

So this page does not offer you a test. There is no breathing pattern, no press of a thumb and no stretch that rules your heart out, and anything that claims otherwise is selling you reassurance. If your chest wall hurts and no lifting injury explains it, costochondritis covers that ground, and red flags in physiotherapy sets out the symptoms that get checked before any exercise program starts.

What is a pec strain?

The pectoralis major is the broad fan of muscle across the front of your chest. It runs from the breastbone, the collarbone and the upper ribs out to the front of the upper arm bone, where it twists into a tendon that is narrower than most people picture. Its jobs are bringing the arm in toward your body and turning it inward, which is why a chest muscle strain shows up when you push a heavy door, hug someone, reach across yourself for a seatbelt or roll over in bed.

A strain means that load has outrun what the muscle or its tendon could take, and some fibers have given way. That runs from a few fibers at the mild end to the whole tendon coming off the arm bone at the other, and the mechanism is usually the same at both ends. The muscle is pulling hard while something stretches it, with the arm out to the side and turned outward. A systematic review of 365 published cases found 83% came from that kind of indirect load rather than a blow, and 48% of them happened during weight training (ElMaraghy and Devereaux, 2012).

Read those percentages for what they are. They describe published cases, which are weighted toward the injuries bad enough to write up, and in the earlier meta-analysis of 112 reported ruptures every single patient was a man (Bak and colleagues, 2000). They tell you how these injuries happen. They do not tell you how common a mild strain is in the general population, because nobody counts those.

There is a consequence to that, and it needs saying out loud if you are not a young man who lifts. The systematic review of repairs pooled 536 patients, of whom exactly 1 was a woman, and their average age was 28 (Yu and colleagues, 2019). So everything this page can tell you about how the injury behaves, what it does next and how long it takes was measured almost entirely in young men. A woman or an older reader can certainly tear a pec, but the reassurance on offer here is thinner for her, because almost none of it was measured in anyone like her.

Age counts the other way too: NICE lists age among the factors that make angina more likely, along with being male and the usual cardiovascular risk factors (NICE CG95, 1.3.3.4), and the same guideline tells clinicians not to read chest pain symptoms differently in men and women. Both of those push the same-day check up rather than down.

One more thing about the word strain. When an international group of sports medicine clinicians looked at how muscle injury terms are used, strain was the term they disagreed about most, which is why one clinician's strain is another's low grade tear (Mueller-Wohlfahrt and colleagues, 2013). If two people have told you two different things about your chest, that is part of the reason.

What does a pec strain feel like?

A pulled, grabbing soreness at the front of the chest or in the fold at the front of the armpit, sore to press, sorer to push against, and worst when the arm travels out to the side and back. Everyday things find it before the gym does: pulling a car door shut, pushing up out of a bath, carrying a bag across the body on that side. Most people can still use the arm, and that is the point worth holding on to. What none of this does is tell a chest muscle from a heart, because every item on that list is effort through the arm, which is why the first section of this page comes before this one.

The strain end of this injury has never been described in a study, so what you have just read is clinical experience and nothing stronger. The tear end has published signs, and they are different enough that you do not need to be a clinician to notice them: a pop or a tearing feeling at the moment of injury, then swelling and bruising that spread into the armpit and down the upper arm, a fold at the front of the armpit that looks wrong next to the other side, and genuine weakness bringing the arm in and turning it inward (Long and colleagues, 2022).

Two patterns catch people out. Bruising can take a day or two to come out, so an injury that looked mild at the time can look much less mild on Thursday. And pain is a poor guide to size here, because a tendon that has come fully off can hurt less at rest than a muscle that is partly torn and still pulling.

Pec strain vs tear: what is different

This is the question most people have under the one they typed, and it has a short answer and a longer one. The short answer: a strain is an overloaded muscle that still works, and a tear is a structural failure that often needs a surgeon's opinion within weeks rather than months.

The longer answer is in how the injuries are classified. The accepted system sorts them by where the failure is, at the origin or in the muscle belly, anywhere from the junction of muscle and tendon out to the insertion, or a piece of bone pulled off, and then by how much of the thickness and width has gone (ElMaraghy and Devereaux, 2012). Where the failure sits and how much of it has gone are what decide the plan, and they are what an examination and usually an MRI are for (Butt and colleagues, 2015).

The reason to settle this quickly is the timing of surgery. The meta-analysis that first put a window on it concluded that repair gave significantly better results than conservative care or late surgery, preferably inside the first 8 weeks after the injury (Bak and colleagues, 2000). Read that as a surgeon's outside limit and not as your own allowance. The clock starts on the day of the injury rather than on the day you decide to act, and inside the window earlier still beats later, which is what the acute against chronic comparison measures.

A later meta-analysis of 384 injuries found that repairs done acutely beat repairs done once the injury was chronic, both on function and on appearance (Bodendorfer and colleagues, 2020). Neither paper gives you a date to hold anyone to. Bak's 8 weeks is written as a preference and not as a cut-off, Bodendorfer's report never says in weeks what it counted as acute, and the accepted classification sorts these injuries into acute and chronic without putting a number on where one becomes the other (ElMaraghy and Devereaux, 2012). Which side of it you are on is a judgement about your own tendon, made by somebody who has examined it and usually seen a scan of it.

The strength difference is the part patients tend to feel: in a small series of complete tears at the tendon end, the repaired group got back to 99% of the uninjured side's peak torque, and the group managed without surgery to 56% (Hanna and colleagues, 2001). Twenty two tears in twenty one patients is a small study, and it is still the clearest direct comparison there is.

Being past the window is not the same as being past help, and reading it that way does its own damage. A review of current management says it plainly: early surgery is preferable, good outcomes in the chronic setting are still achievable, direct repair to the bone is possible in acute and in most chronic cases, and where it is not, reconstruction using a graft is considered (Butt and colleagues, 2015). That same review's first point is that the diagnosis gets recognized and the patient gets referred to a surgeon who deals with these injuries. So if this happened to you months or years ago, nobody examined it, and the arm has never pushed properly since, the next step is a surgical opinion rather than a decision at home that the chance has gone.

None of that means a strain needs an operation. It means the same injury name covers two situations with different clocks, and the slow one has a cost. The warning signs at the foot of this page give the route for a suspected tear, and it is the same day, not next week.

How long does a pec strain take to heal?

Nobody has published a figure for the mild end, and anyone quoting you a confident number for a grade one pec strain is quoting their own practice, not a study. Saying so plainly is better than printing a timetable that has nothing behind it.

The wider muscle injury literature only takes you so far. Most muscle injuries recover well without surgery, the treatments used for them have rarely been tested in clinical trials, and a recovery that is managed badly can delay a return to sport by weeks or months (Jarvinen and colleagues, 2005). That last point is the one that matters for a pec, because the usual way this injury drags on is a return to full depth pressing two weeks too early, twice.

The published numbers that do exist are about surgery, and they are not your timeline unless you have had an operation. A systematic review pooled 536 patients who had a torn tendon repaired, and of the ones whose return was reported, 90% got back to sport at an average of about 6 months and 74% got back to their previous level (Yu and colleagues, 2019).

So judge progress by the chest rather than by the calendar. Mild soreness during a set that settles soon after you stop and leaves you no worse the next morning is the level to work at.

Soreness that builds through a set, sharp pain, or a chest that is clearly worse the next day means the last step was too big, so drop back a stage for a few days and try a smaller one. One pattern is not a load error and does not get a smaller step. If chest pain, pressure or tightness is arriving at lower effort than it did at first, or coming back more often, that is the pattern a clinician assesses as a possible heart problem rather than a healing muscle (NICE CG95, 1.2.1.3), and it goes to the warning signs at the foot of this page instead of into the next session. A sore spot that only complains when you press or push it is a different thing from a chest that now tightens at an effort it used to manage.

The pain monitoring model is the same idea with numbers attached, which some people find easier to hold to than a feeling.

How to use this program

One step comes before stage 1. The first warning sign at the foot of this page is written for everybody who arrives here with chest pain, including the reader who matches none of the emergency signs inside it, and its second half says to get medical advice the same day and not to exercise again until you have been checked. If that has not happened yet, that is the step, and the program waits.

Then start at stage 1, even if the injury feels minor, and move up when the current stage is comfortable and your chest is no worse the morning after it. Each stage replaces the one before it rather than being added to it, so when you move up, the earlier holds or push-ups come out of the session. The pendulum is the one part worth keeping on for as long as it helps. Two stages stacked into one session is how a chest that was ready for the next step ends up loaded twice in a day. This is education rather than a plan for your particular chest, and if a clinician has given you one, theirs comes first.

Each exercise page gives a typical starting dose, and the stage notes above repeat them. The holds in stage 1 suit most days, while the pushing work in stages 2 and 3 is usually done 2 or 3 days a week so the muscle can recover between sessions. Your physio will set the range and the numbers for you, and swap an exercise that does not suit your chest. Pendulums and the isometric adduction hold are the two to get right first, because everything later is built on a chest that can take a quiet contraction without flaring.

Three situations this page cannot see, and what to do in each. If you cannot get an appointment, keep the two errands apart: being checked for chest pain is urgent care or emergency services and it does not wait for a referral, while finding a physiotherapist can wait, and the first one is not satisfied by doing the second. If there is nobody to clear you for the next stage, that is not a reason to stay still and it is not permission to skip ahead, so stay at the stage that is comfortable, give each new stage a week before you judge it, and keep using the morning-after rule.

If the injury was months or years ago, do not use stage 3 as a test of whether you have recovered: start at stage 1 like everybody else, because a chest that has pressed nothing for a year is out of condition as well as mended, and a full push-up is a poor way to find that out. One version of an old injury is not mended at all, so check it against the signs first. A pop at the time, bruising that spread into the armpit, a fold at the front of the armpit that still looks different from the other side, or pushing strength that never came back, any of those and the step before stage 1 is a surgical opinion rather than a program, however long ago it was.

If you have high blood pressure, breathe steadily through every repetition and never hold your breath. With a heart condition or high blood pressure, check with your doctor before you start.

Stop at once for any of these: chest pain or pressure, dizziness or feeling faint, a racing or irregular heartbeat, or being far more out of breath than the effort should cause. Stopping is the right call even if it turns out to have been the same pain you came with, because nothing you can do at home separates one from the other, and a session missed costs you nothing. Then follow the chest pain warning signs at the foot of this page, which say what to do next and how fast. If you faint while exercising, call emergency services, even if you feel fine again quickly. If you live alone, keep a phone within reach while you exercise, and call emergency services yourself rather than waiting for somebody to reach you.

If you are pregnant, check with your midwife, doctor or physio first. That is not a formality on this page, because stages 2 and 3 are pressing work and the knee and full push-ups hold a plank position, which loads the wall of your tummy at the same time as the chest. If you are pregnant or have had a baby in the last few months, plan those two stages with your midwife, doctor or physio rather than working up to them alone, breathe out as you push instead of holding your breath, and stop and ask before going further if a ridge or dome appears down the middle of your tummy, if you leak, or if you feel heaviness or bulging in your vagina. The wall push-up and the band press, done standing, are the pressing work to stay with meanwhile, and diastasis recti covers the tummy wall side of this properly. After surgery to repair the tendon, after any chest, heart or lung operation, or after shoulder surgery, follow the program from your surgical team and physio rather than this one, and read the section below before you touch a push-up.

The exercise program

The exercises below carry their own stop signs and precautions. Open the line under an exercise and read them before you try it.

Getting back to pressing, push-ups and the bench

Pressing is how most of these injuries happen, and that shapes how pressing comes back. Weight training accounted for 48% of the 365 published cases in the classification review (ElMaraghy and Devereaux, 2012), and bench pressing specifically was behind 49% of the injuries pooled in the review of repairs (Yu and colleagues, 2019). That is a reason to change the lift for a while rather than to drop it for good.

Four changes do most of the work, and clinical reasoning, not a trial, is what sits behind them. Bring the grip in, so the upper arm stays closer to your body at the bottom. Stop the bar short of your chest, with boards, pins or a floor press, so the shoulder never reaches the stretched position the injury happened in. Cut the number of sets before you cut the weight. And keep rowing and back work going the whole time, because it rarely bothers a sore chest and it stops the shoulder losing ground while pressing is reduced.

Then put the range and the depth back last, one at a time, with a week between changes. Shoulder pain on the bench press goes through the same changes for a sore shoulder, and returning to the gym after injury covers how to plan the load across a training week. Dips and wide grip flyes are the two to leave until the end, for the same reason the warning signs on this page name a press and a dip.

After surgery to repair a pectoralis major tendon

This is a short section on purpose: your surgeon's protocol is your program, and nothing here replaces it.

What the operation does is quick to describe and slow to heal. The torn tendon is brought back against the arm bone and held there, through tunnels drilled in the bone, or with buttons, anchors or screws, and the meta-analysis of 384 injuries found no significant difference in outcome between those methods (Bodendorfer and colleagues, 2020). In the early weeks what holds the tendon on is that fixation rather than healed tissue, which is the reasoning behind the restrictions every protocol opens with.

The position a fresh repair is kept away from is the one the injury happens in: the arm going out to the side, turning outward, and travelling behind the line of the body. Your surgeon decides when each of those comes back, and if you were given a sling it is doing the same job. The three stages higher up this page are written for a strain and are not a post-operative program, so the wall push-up, the band press and the push-ups wait for your own team's date rather than for the way your chest feels on the day.

Protocols differ widely. A systematic review of 536 repaired patients found that rehabilitation varied across the studies it included. Of the 12 that reported a timetable at all, seven had shoulder movement inside 4 to 6 weeks of surgery and then isometric work before progressive resistance, seven allowed full activity within 6 months, two held it back for up to a year, and one had patients moving freely at 2 to 3 weeks (Yu and colleagues, 2019). That is the width of the real spread, and the review found no accepted standard for when return to sport should happen.

So a date you read somewhere else is not evidence that your own team is being slow, and no figure on this page is permission to do more than your own protocol allows. Where your team's plan is tighter than anything written here, theirs is the one that counts, every time.

The outcome figures from that review are easier to judge in plain numbers. Of the patients assessed, 90% returned to sport at an average of about 6 months and 74% to their previous level, 95% returned to work at an average of about 7 months, 18% had a complication, reruptures and wound infections being the commonest at about 4% each, and 7% needed a second operation (Yu and colleagues, 2019). Those patients averaged 28 years old and exactly 1 of the 536 was a woman, so read the figures as the experience of a young, almost entirely male and mostly athletic group. Read the months the same way, as descriptions of what happened inside surgeons' protocols rather than as dates you can clear yourself on. In that same review, rehabilitation did not begin until about 4 weeks after surgery on average, which is worth knowing if the first weeks feel slower than you expected (Yu and colleagues, 2019).

Day to day, four of the warning signs at the foot of this page are written for you and not for someone with a strain, and these are the four. Anything that feels like the original pop happening again, new weakness pushing, or the fold at the front of the armpit starting to look different from the other side again, with or without anything to blame it on. A wound going the wrong way, which includes one still leaking in the second week. An arm or hand that gets more swollen instead of settling, or turns throbbing, warm or red. And a calf or thigh doing the same thing, because a clot can form in a leg while an arm is out of action.

All four are same day, not Monday. Both clot signs turn into an emergency call if you are also short of breath or have chest pain, and the pulmonary embolism line in the emergency list is the one to read before you need it.

When to see a physio or doctor

See a physical therapist (physiotherapist) if the chest is getting worse instead of better, if two to three weeks of settling it down and stage 1 have made no real difference, if you cannot work out which stage you belong in, or if pushing is still weak once the pain has gone, because weakness that outlasts pain is worth examining rather than training through. Go the same day, not later, for anything on the warning list below.

Mention two things when you are seen, because both change what gets examined. Say whether there was a pop, and say where the bruising went. Say too if the pain is in the fold at the front of the armpit rather than across the chest, since that is where the tendon is and it is the part that matters most for the decision about surgery.

If the sore spot turns out to sit on top of the shoulder or deep at the front of the joint instead of in the chest, you may be in the wrong place: rotator cuff tendinopathy and AC joint sprain cover those, and shoulder pain when lifting your arm sorts between them. Nothing on this page is advice about your own chest pain, and nothing here is a way of deciding at home that a chest pain is safe.

For physiotherapists

Screen before you stage, and keep one figure and its denominator to hand. Disla and colleagues (1994) assessed 122 consecutive emergency department presentations of chest pain, having excluded trauma, fever and malignancy first; 36 of those patients had costochondritis, and the acute infarction rate inside that group was 6% against 28% among the others.

Note what the exclusions do to how far it travels. Trauma, fever and malignancy were screened out before anyone was counted, so the figure describes none of those three patients, and it was never a probability for a pectoralis major strain in the first place. The single inference it carries here is the one worth carrying: a reproducible chest wall source lowers the odds and clears nobody.

Reproduction of pain on resisted adduction and internal rotation localizes the problem to the pectoralis major. It excludes nothing. NICE CG95 recommendation 1.2.2.8 is the useful companion to that, since it asks a clinician who has made an acute coronary syndrome less likely to turn to the other acute causes and to take the life-threatening ones first, naming pulmonary embolism, aortic dissection and pneumonia. The warning list on this page carries a route for each.

The two facts that change management are location and extent, as ElMaraghy and Devereaux (2012) set them out: origin or muscle belly, musculotendinous junction through to insertion, or bony avulsion, with thickness and width stated separately. Weakness in adduction and internal rotation, loss or asymmetry of the anterior axillary fold, and bruising tracking into the axilla and upper arm are the findings that should move a patient toward imaging and a surgical opinion rather than into stage 2 (Long and colleagues, 2022). Butt and colleagues (2015) report that history and examination are often sufficient for diagnosis, with dedicated sequence MRI the imaging of choice.

The timing argument is why urgency is justified. Bak and colleagues (2000) put repair preferably inside 8 weeks. Bodendorfer and colleagues (2020) found acute repair superior to chronic on function and cosmesis across 384 injuries. Neither defines acute numerically, so refer urgently without quoting 8 weeks to a patient as a deadline.

Butt and colleagues (2015) is the counterweight for the late presentation: early surgery is preferable, direct repair to bone is achievable acutely and in most chronic cases, graft reconstruction where it is not, and their first point is referral to a surgeon who deals with these injuries. A chronic unrepaired rupture is a surgical opinion rather than a loading problem, whatever the date of injury.

Be straight with patients about what is not known. We found no published rehabilitation protocol for a low grade pectoralis major strain and no trial of one, so the staging here is reasoned from general muscle injury principles and from the doses our own exercise pages carry, rather than lifted from a guideline. Jarvinen and colleagues (2005) is the honest citation for the general case, including the point that mismanaged recovery costs weeks.

The staging decision worth defending is leaving end range pectoral stretch out altogether: horizontal abduction with external rotation is the injury mechanism, while isometric adduction and internal rotation load the muscle early at a length that does not provoke it. Progress pushing through wall angle and then body position rather than through repetitions, and leave wide grip pressing at full depth until the very end.

Clinical review kept both choices and added one gate to the first: the stage 1 holds are not for the patient who still has the tear signs, since resisted adduction and internal rotation are the provocation tests themselves, so the pendulum carries stage 1 alone until that patient has been seen. Where a stretch comes back at all, the anchor we give patients is a comfortable stage 3 rather than a week count, because nothing in the literature dates it.

Two dose caps were added at clinical review, and no number was changed to get them. Every figure in the stages came from the exercise page it belongs to and every one of them is in range on its own, but the stages prescribe exercises that load the same muscle, so the totals ran ahead of what the individual figures look like. Taken at their top ends, stage 1 came to 40 isometric holds a day across adduction and internal rotation, and stage 2 came to 90 pressing repetitions in one session between the wall push-up and the band press. The page now tells the patient to count each pair as one lot of work and to sit at the lower end where both are in on the same day.

The second cap also settles a frequency mismatch a patient can see for herself: this page puts the pressing work on 2 or 3 days a week, the band press page says most days or every other day, and the stage note is the one that governs here. A third multiplier sat between the stages rather than inside one, so neither of those caps touched it: nothing said whether a stage replaces the one before it or is added to it, and a patient who adds stage 2 to a stage 1 she is still doing takes the isometric load and the pressing load in the same day. The page now says each stage replaces the one before, with the pendulum the only carry-over.

The same review also corrected two instructions. The stage 2 note had offered a shorter band as the way to make the press easier, which is backward, since shortening the grip is how tension is added on that page; easing it now means letting band out, and the wall angle is the variable for the push-up. And the adduction hold's own page sets the arm height from the physio's instruction, which leaves a patient with no physio choosing it herself, so the stage note now specifies elbow in front of the chest rather than out to the side. Both of those are the injury mechanism in miniature: horizontal abduction with external rotation, arrived at by following a vague instruction rather than by a decision.

Common questions

References

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Written and checked by the PocketPhysio editorial team. Last updated 2026-10-30.

This page is general education, not a diagnosis or a personal treatment plan. See a physiotherapist or doctor for advice about your own situation.