Shoulder Impingement: The Injury That Doesn't Care If You're an Athlete

You reach up to grab something off a shelf and feel a sharp catch in your shoulder. Or you're halfway through a swimming set and that familiar ache starts creeping in. Maybe you've been at your desk for 8 hours and your shoulder just feels... wrong.

Welcome to shoulder impingement -- the most common shoulder diagnosis I see in clinic, and one that affects office workers and elite athletes in almost equal measure.

What's Actually Happening in Your Shoulder

Your shoulder joint has a small space between the top of your upper arm bone (the humeral head) and the bony roof above it (the acromion). This gap is called the subacromial space, and it's where your rotator cuff tendons and a fluid-filled cushion called the bursa live.

When everything is working well, there's plenty of room. When it's not, these structures get compressed -- pinched -- every time you raise your arm. That's impingement. And it hurts.

The pain is typically worst between 60 and 120 degrees of shoulder elevation -- the so-called "painful arc." Reaching behind your back, sleeping on the affected side, and overhead activities tend to aggravate it. Sound familiar?

Why It Hits Athletes and Desk Workers Alike

This is the part that surprises most people. Shoulder impingement doesn't discriminate. Here's why it affects two seemingly opposite populations:

The Athlete's Version

Swimmers, tennis players, volleyball players, CrossFit enthusiasts -- anyone who repeatedly moves their arm overhead. The mechanism is straightforward: high-volume repetitive overhead loading creates microtrauma in the rotator cuff tendons and causes irritation in the subacromial space. Add in the fatigue factor -- when your rotator cuff muscles get tired, they stop doing their job of keeping the humeral head centred, and it migrates upward into the acromion. More compression. More pain.

The Desk Worker's Version

Sitting hunched over a keyboard for 8-10 hours a day does something insidious to your shoulder mechanics. Your thoracic spine rounds forward, your scapulae (shoulder blades) tip forward and rotate downward, and your pectoral muscles shorten. This combination effectively narrows the subacromial space before you've even moved your arm. Then when you do reach overhead -- even for something simple -- there isn't enough room. Impingement.

The Misconceptions That Slow Recovery

Before we talk about what works, let's clear up what doesn't.

"I need a scan to know what's going on." Not necessarily. Imaging findings in shoulders are notoriously unreliable. Studies consistently show that a significant percentage of people with zero shoulder pain have rotator cuff tears, labral changes, and signs of "impingement" on MRI. A thorough clinical assessment tells me more than most scans. I'll refer for imaging if I suspect something that would change management -- a full-thickness tear, a fracture, a dislocation. But for the majority of impingement presentations, a scan won't change the rehab plan.

"It's a structural problem, so I need surgery." For most cases of shoulder impingement, no. Research has consistently shown that structured physiotherapy produces outcomes equivalent to subacromial decompression surgery for the majority of patients. Surgery absolutely has its place -- but it's rarely the first option, and it shouldn't be offered before a proper rehab program has been attempted.

"I should rest it until it stops hurting." Rest feels logical, but it's counterproductive. Complete rest leads to stiffness, further weakening of the rotator cuff, and worsening of the movement patterns that caused the problem. You need modified activity and targeted loading -- not avoidance.

The Three Areas You Need to Address

Every effective impingement rehabilitation program targets these three areas. Miss one, and you'll likely plateau or relapse.

1. Scapular Control and Stability

Your scapula is the foundation of everything your shoulder does. When you raise your arm, your scapula is supposed to rotate upward, tilt posteriorly, and glide smoothly along your ribcage. This coordinated movement -- scapulohumeral rhythm -- is what maintains the subacromial space during overhead motion.

In impingement patients, this rhythm is almost always disrupted. The scapula doesn't rotate enough, or it tips forward, or the muscles controlling it (serratus anterior and lower trapezius in particular) are weak and poorly timed.

Key exercises:

• Wall slides with scapular focus -- Slow, controlled overhead reaching against a wall, cueing upward rotation and posterior tilt.
• Serratus anterior punches -- Supine or standing, pushing a weight straight toward the ceiling with emphasis on the "plus" at the top (protraction).
• Lower trap Y-raises -- Prone on a bench, lifting arms in a Y pattern with thumbs up, focusing on squeezing the lower traps.
• Side-lying scapular protraction/retraction -- Isolated scapular control work to re-establish motor patterns.

2. Rotator Cuff Strength (Especially External Rotators)

The rotator cuff's primary job isn't to move your arm -- it's to stabilize the humeral head in the socket during movement. When the cuff is weak, the larger muscles (deltoid, pecs, lats) overpower it, and the humeral head migrates superiorly. That upward drift is exactly what narrows the subacromial space.

The external rotators -- infraspinatus and teres minor -- are the most commonly under-trained muscles in the shoulder. They counterbalance the strong internal rotators and are critical for maintaining proper humeral head position.

Key exercises:

• Side-lying external rotation -- The foundational exercise. Light weight, controlled tempo, towel roll between the elbow and torso.
• Band pull-aparts -- Standing, pulling a resistance band apart at chest height with arms straight. Targets the posterior rotator cuff and scapular retractors simultaneously.
• 90/90 external rotation -- Arm abducted to 90 degrees, elbow at 90 degrees, rotating the forearm upward against resistance. This is the position where the cuff works hardest.
• Eccentric external rotation -- Using a cable or band, emphasis on the slow lowering phase. Eccentric loading is particularly effective for tendon-related impingement.

3. Thoracic Spine Mobility

This is the area most people overlook entirely -- and it might be the most important one for desk workers. Your thoracic spine (mid-back) needs to extend and rotate for your shoulder to function properly overhead. When it's stiff and rounded -- which it will be if you sit at a desk all day -- your scapula can't position itself correctly, and your shoulder pays the price.

I tell every patient the same thing: if your mid-back doesn't move, your shoulder will try to make up the difference. And it will fail.

Key exercises:

• Foam roller thoracic extensions -- Lying over a foam roller positioned at mid-back, gently extending over it with arms crossed or behind the head.
• Open book rotations -- Side-lying, rotating the upper body while keeping the hips stacked. Excellent for thoracic rotation.
• Cat-cow variations -- On hands and knees, segmental flexion and extension through the thoracic spine. Focus on the mid-back, not the lower back.
• Thread the needle -- From a quadruped position, reaching one arm under and through, then opening up to the ceiling. Combines rotation and extension.

Red Flags: When to Get Checked Urgently

Most shoulder impingement is manageable with physiotherapy. But some symptoms warrant urgent assessment:

• Sudden inability to raise your arm after a traumatic event -- may indicate an acute rotator cuff tear.
• Significant weakness that came on suddenly, especially in external rotation -- possible nerve involvement or acute tear.
• Night pain that wakes you consistently and isn't improving after 2-3 weeks -- needs further investigation.
• Shoulder instability -- the feeling that your shoulder is "slipping" or about to dislocate.
• Pain that doesn't change at all with movement or position -- could indicate a non-musculoskeletal cause.
• Unexplained weight loss, fever, or feeling generally unwell alongside shoulder pain -- seek medical attention.

These aren't meant to alarm you. The vast majority of shoulder pain I see in clinic is mechanical and treatable. But it's important to know when something needs more than rehab exercises.

What Treatment at Right Track Looks Like

When you come to us with shoulder impingement, here's what happens:

1. Thorough assessment -- We test your shoulder range of motion, rotator cuff strength, scapular control, thoracic mobility, and cervical spine (neck problems often masquerade as shoulder issues). We identify the specific drivers of your impingement, not just the symptoms.
2. Pain management in the early phase -- If you're in acute pain, we'll use manual therapy techniques, load modification, and taping to bring the pain down quickly. The goal is to get you comfortable enough to start the active rehab that actually fixes the problem.
3. Individualized exercise program -- Based on your assessment findings, your occupation, and your sport (if applicable). A swimmer's program looks different from an office worker's program, even if the diagnosis is the same. We address all three areas -- scapular control, rotator cuff strength, and thoracic mobility -- in a structured progression.
4. Movement retraining -- For athletes, we specifically address the overhead mechanics causing the issue. For desk workers, we address postural habits and ergonomic strategies. Exercises alone aren't enough if you go back to the same patterns that created the problem.
5. Return to full activity -- Gradual reintroduction of provocative activities with objective benchmarks. For a swimmer, that's a structured return-to-pool protocol. For a desk worker, it might be sustained overhead reaching or lifting without pain.

Most impingement cases resolve within 6-12 weeks of consistent physiotherapy. Some people feel significant improvement within the first 2-3 sessions. The key is consistency -- showing up, doing the exercises, and trusting the process.

The Bottom Line

Shoulder impingement is not a death sentence for your training or your quality of life. It's a signal that something in your shoulder mechanics needs attention. The subacromial space is small, and it doesn't take much dysfunction to create problems -- but it also doesn't take much targeted work to fix them.

Whether you're a competitive swimmer dealing with 2,000 metres of overhead strokes per session, or a software developer who hasn't thought about their posture in years, the principles are the same. Improve scapular control. Strengthen the rotator cuff. Mobilize the thoracic spine. Be consistent.

Your shoulder is designed to move. Let's make sure it can.

Antonis Petri, BSc, OMPT

Lead Clinician & Co-Founder at Right Track Physiotherapy. Clinical Practice Supervisor at Frederick University. A former amateur footballer with over a decade on the pitch, he specializes in sports rehabilitation and return-to-performance programs for athletes in Cyprus.