Authored by Marco Marco Bevellino, MSK Physiotherapist (HCPC & CSP registered) | Last updated: July 2026

If you spend most of your working day at a desk and you feel a sharp, catching pain when you lift your arm, there is a good chance you are dealing with shoulder impingement. It is one of the most common causes of shoulder pain we see in our London clinics, and office workers are particularly prone to it. The link between poor desk posture and shoulder impingement is well known: hours of sitting with rounded shoulders and a forward head position gradually change the way your shoulder moves, until everyday actions like reaching for a shelf or putting on a coat start to hurt. The good news is that shoulder impingement responds very well to physiotherapy, especially when it is addressed early. In this article, we explain what shoulder impingement is, why your desk setup may be causing it, and what effective treatment looks like.

What is shoulder impingement?

Shoulder impingement is a condition in which the tendons of the muscles that cover your shoulder blade, also known as the rotator cuff, become irritated or... compressed as they pass through the narrow space at the top of your shoulder. This causes pain when you raise your arm, particularly between shoulder height and overhead. It is sometimes called subacromial impingement or swimmer's shoulder.

Your shoulder is the most mobile joint in your body, and that mobility comes at a price. The rotator cuff, a group of four muscles and their tendons, keeps the ball of the joint centred in its socket while you move. These tendons run through a small gap beneath the bony tip of your shoulder blade (the acromion). When that space narrows, or when the tendons swell through irritation, they get pinched with every lifting movement. Over time this can lead to inflammation of the tendons and the fluid-filled sac (bursa) that cushions them.

Shoulder impingement is closely related to other rotator cuff problems. Left unaddressed, ongoing irritation can progress towards a more significant rotator cuff injury, which is why early treatment matters.

What are the symptoms of shoulder impingement?

The classic symptom of shoulder impingement is pain at the top or outside of the shoulder when you lift your arm, especially through the middle of the movement. Pain when reaching overhead, behind your back or across your body is also typical, and many people notice an ache at night when lying on the affected side.

Common shoulder impingement symptoms include:

• Sharp or catching pain when raising your arm to the side, often worst between roughly 60 and 120 degrees (the so-called painful arc)

• A dull ache in the shoulder or upper arm after desk work, driving or repetitive tasks

• Pain when reaching into a back pocket, fastening a seatbelt or putting on a jacket

• Night pain when lying on the affected shoulder

• A feeling of weakness or reluctance to use the arm overhead

Symptoms usually build up gradually rather than starting with a single incident. Many desk workers describe a shoulder that felt "a bit stiff" for weeks before the pain became sharp. Strength is often preserved in the early stages, which distinguishes impingement from a rotator cuff tear, although only a proper assessment can tell the difference reliably.

How does poor desk posture cause shoulder impingement?

Poor desk posture causes shoulder impingement by changing the position of your shoulder blade, which physically narrows the space the rotator cuff tendons move through. When you sit with rounded shoulders and your head forward of your body, your shoulder blade tips forward and downward, and every arm movement then pinches the tendons a little more than it should.

Think about a typical day at a desk in the City: eight or more hours with your arms reaching forward to a keyboard, shoulders hunched towards a screen that is slightly too low, and your upper back gradually stiffening into a rounded position. 

This posture does three unhelpful things at once. 

First, it tightens the chest muscles and the front of the shoulder, pulling the joint forward. Second, it lengthens and weakens the muscles between the shoulder blades that normally hold your posture upright. Third, a stiff upper back stops the shoulder blade rotating properly when you lift your arm, so the narrow subacromial space closes down sooner in the movement.

None of this causes pain overnight. The problem develops through thousands of small repetitions, which is exactly why desk-based workers are so overrepresented among impingement patients. Age-related changes in the tendon, previous shoulder problems and activities such as swimming, tennis or weight training can all add to the load, but for many of our patients at our Moorgate clinic, the desk is the main driver.

How is shoulder impingement treated?

The most effective treatment for shoulder impingement is a structured physiotherapy programme that settles the irritated tendon, restores normal shoulder blade movement and rebuilds rotator cuff strength. Research and NHS guidance agree that the vast majority of cases resolve without injections or surgery when they are managed this way, and the Chartered Society of Physiotherapy notes that most musculoskeletal shoulder problems start to improve within six to eight weeks.

Step 1: settling the symptoms

Treatment starts with calming the irritated tendon: adjusting the activities that provoke pain, hands-on treatment to release overactive muscles around the shoulder and neck, and advice on positions that take pressure off the tendon.

Step 2: fixing the underlying causes

From there, the emphasis shifts to why the impingement developed. Your physiotherapist will work on the mobility of your upper back, the position and control of your shoulder blade, and the strength of the rotator cuff itself, alongside the postural habits that set the problem off.

Depending on your assessment, your treatment plan at Q Sports Physio may combine:

• A physiotherapy assessment - the foundation of every treatment plan, confirming the diagnosis and ruling out other causes. 

• Shockwave therapy - an evidence-based option for stubborn, long-standing tendon problems that stimulates the tendon's natural healing response. 

• Manual therapy techniques - may include deep tissue massage, joint mobilisation, dry needling, and instrument-assisted soft tissue mobilisation (IASTM). To release the tight chest and neck muscles that hold the shoulder in a poor position. 

Most people notice meaningful improvement within six to twelve weeks of starting a well-targeted programme, although long-standing cases can take longer.

What exercises help shoulder impingement? 

The exercises that resolve shoulder impingement are the ones matched to what is driving your symptoms, and that differs from shoulder to shoulder. A few gentle movements are safe for most people, though, and can take the edge off while you arrange an assessment. Think of them as first aid rather than a fix.

Three easy movements you can try at home: 

• Pendulum swing - lean forward with your good arm resting on a table, let the sore arm hang loosely and make small, relaxed circles. This moves the joint gently without loading the irritated tendon. 

• Shoulder blade squeeze - sitting tall, gently draw your shoulder blades back and down, hold for a few seconds and release. This counters the rounded position your shoulders fall into at a desk. 

• Upper back extension over your chair - sit with your mid back against the backrest, support your head with your hands and gently arch your upper back over the chair. This eases the stiffness that narrows the space in your shoulder. 

Keep the movements small and comfortable, and stop if pain increases or lingers afterwards. If they bring relief, that is encouraging - but be aware that these movements ease symptoms, they do not fix the cause. Generic routines assume every shoulder has the same problem, while in reality one person’s impingement is driven by a stiff upper back, another’s by poor shoulder blade control, and a third’s by a weak rotator cuff. Loading a tendon that is still highly irritable, or strengthening into a faulty movement pattern, tends to make things worse rather than better. 

That is why the core of lasting recovery is a programme built around your specific movement problem. After your assessment, your physiotherapist will typically combine mobility work for the upper back and shoulder, exercises to retrain how your shoulder blade sits and moves, and progressive strengthening of the rotator cuff, often using resistance bands and light weights - tailored and adjusted as your shoulder improves. 

Still sore after a week or two of these movements? That usually means the underlying cause needs addressing. Book a physiotherapy assessment at one of our three London clinics. 

Alongside your exercises, sensible desk adjustments help take daily strain off the tendon: 

• Raise your screen so the top third is at eye level, to reduce the forward head position.

• Bring your keyboard and mouse close, so your elbows rest near your sides.

• Sit with your hips back in the chair and your forearms supported 

• Break up long sitting periods: stand, move and change position briefly every 30 to 45 minutes

• Changing mouse, a vertical mouse can help improve the shoulder/forearm posture and reduce the mechanical load in your shoulder

If your employer offers workplace support, our occupational health service helps desk-based teams tackle exactly these issues.

When should you see a physiotherapist for shoulder impingement?

See a physiotherapist if your shoulder pain has lasted more than one to two weeks, is disturbing your sleep, or is limiting your work, sport or daily activities. Early assessment leads to faster recovery and reduces the risk of the problem becoming chronic.

Shoulder impingement rarely disappears while the habits that caused it continue, and most desk workers cannot simply stop sitting at a desk. A physiotherapist will confirm the diagnosis, rule out other causes of shoulder pain such as a rotator cuff tear or a frozen shoulder, and give you a clear plan. Seek more urgent advice if your shoulder pain follows a fall or accident, if the arm feels suddenly weak, or if you have night pain that does not ease in any position.

Get your shoulder assessed at Q Sports Physio

Shoulder impingement usually responds well to treatment, and starting early gives you the best chance of a quick recovery. Book a physiotherapy assessment at our Kew, Gunnersbury Park or Moorgate clinic and get a treatment and exercise plan tailored to your shoulder and your working day.

Book an appointment online - appointments are usually available within 48 hours.

Frequently asked questions about shoulder impingement

Can shoulder impingement heal on its own? 

Mild cases can settle with relative rest and better posture, but if the underlying causes - a stiff upper back, weak rotator cuff and poor desk posture - are not addressed, symptoms usually return. Physiotherapy targets those causes so the improvement lasts.

How long does shoulder impingement take to heal? 

Most people improve significantly within six to twelve weeks of structured physiotherapy. Long-standing cases, or shoulders that have been painful for many months, can take three to six months to recover fully.

Do I need a scan for shoulder impingement? 

Usually not. Shoulder impingement is diagnosed through your history and a physical assessment. Imaging is only needed when symptoms do not respond to treatment as expected, or when a tear or other condition is suspected.

How should I sleep with shoulder impingement? 

Avoid lying on the affected shoulder. Many people find it more comfortable to lie on the other side with a pillow supporting the upper arm, or slightly propped up on their back. If night pain persists despite these adjustments, that is a good reason to book an assessment.

Can I keep working at a desk with shoulder impingement? 

Yes. You do not need to stop working, but adjusting your desk setup and breaking up long sitting periods will reduce the daily irritation of the tendon while your treatment takes effect.

Is shoulder impingement the same as a rotator cuff tear? 

No. Impingement is irritation or compression of the rotator cuff tendons; a tear is structural damage to the tendon itself. Untreated impingement can, over time, contribute to tendon damage, which is another reason to act early.

About the author

Marco Bevellino, MSK Physiotherapist at Q Sports Physio, specialising in shoulder and upper limb conditions. HCPC registration | CSP member.

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