| What We Treat
Pectoralis Major Strain
Most chest muscle strains settle with loading. A rupture is a surgical decision with a time limit, so telling them apart matters.
Overview
What It Is
Pectoralis major injuries range from a low-grade strain within the muscle to a complete rupture of the tendon where it attaches to the arm. They occur almost exclusively during heavy pressing, most often bench press at or near maximum. A complete rupture in an active person is usually repaired surgically, and outcomes are considerably better when this is done early.
Within the Muscle
Pain during heavy pressing with no change in the shape of the chest. Graded pressing rehabilitation over six to twelve weeks.
Symptoms
How It Tends to Feel
These are the features that point towards this diagnosis rather than another:
Sudden Tearing Sensation
During a heavy press, often with an audible pop.
Pain at the Front of the Shoulder
Where the tendon attaches, rather than in the belly of the muscle.
Extensive Bruising
Across the chest and down the inner arm over the following days.
Loss of the Armpit Fold
The front border of the armpit looking different from the other side.
Weakness Pressing and Bringing the Arm Across
Persisting rather than improving.
A Visible Change in Shape
Bunching of the muscle towards the breastbone in a rupture.
Causes & Risk Factors
What Drives It
The usual contributors, in rough order of how often they turn out to matter:
Heavy Bench Press
The dominant mechanism, particularly the lowering phase at maximal load.
Anabolic Steroid Use
A well-recognised association with tendon rupture.
Sudden Load Increase
Returning to heavy pressing after a break.
Contact Sport
Less common, usually a forced extension of an abducted arm.
How We Can Help You
Treatment & Management
Treatment is built around what the assessment finds, but generally follows this shape:
When to Seek Help
Red Flags — Don’t Ignore These
Most presentations are straightforward. These features are the exceptions, and warrant prompt assessment:
⚠ Seek Medical Advice If You Notice
- An audible pop with immediate weakness and a change in the shape of the chest — seek prompt surgical assessment
- Loss of the normal armpit fold
- Extensive bruising with marked weakness
- Numbness or coldness in the arm
If any of these apply, contact your GP or seek urgent medical care rather than waiting for a physiotherapy appointment.
Common Questions
Frequently Asked Questions
How do I know if it is torn or just strained?
A rupture usually involves a pop, a visible change in the shape of the chest, loss of the armpit fold and persistent weakness. If any of those are present, get it assessed quickly.
Does a rupture need surgery?
In an active person, usually yes, and the results are much better when repaired early. Non-surgical management leaves a permanent strength deficit.
When can I bench press again?
After a strain, typically six to twelve weeks with graded loading. After a repair, considerably longer and guided by the surgical protocol.
Not Sure If This Is What You Have?
An assessment will tell you what is actually going on and what to do about it. I see everyone myself, and you will leave with a plan rather than a leaflet.
Book Your Initial AssessmentThis page is for general information only and isn’t a substitute for individual medical advice. If you’re experiencing any of the warning signs above, contact your GP or seek emergency medical care as appropriate.