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Shoulder impingement is one of those diagnoses almost everyone has heard of.
“My rotator cuff is getting pinched.”
“There isn't enough space in my shoulder.”
“My shoulder catches when I raise my arm.”
There is some useful anatomy behind those descriptions. The rotator cuff, subacromial bursa, biceps tendon, and surrounding structures can absolutely contribute to shoulder pain.
But the traditional explanation—that raising your arm simply pinches a tendon between two bones—is usually too simplistic.
At Ascent Health & Performance in Anchorage, we tend to think about shoulder impingement as a painful movement presentation rather than a single damaged structure. We commonly see pain during humeral flexion or abduction—raising the arm forward or out to the side—often alongside changes in scapular control, shoulder strength, mobility, or tolerance to load.
The painful tissue still matters.
We just don't stop there.
What Does Shoulder Impingement Feel Like?
The classic complaint is pain when raising the arm.
That may show up while reaching into an overhead cabinet, putting on a jacket, pressing a weight overhead, throwing, swimming, working above shoulder height, or simply reaching out to the side.
Some people develop a painful arc, where the shoulder hurts through part of the movement but becomes less painful as the arm continues overhead.
Other common complaints include:
- Pain over the front or outside of the shoulder
- Pain when sleeping on the affected side
- Difficulty reaching behind the back
- Pain with pressing or overhead exercise
- Weakness or hesitation when lifting the arm
- Pain after repetitive shoulder activity
- A feeling of catching, pinching, or irritation during certain movements
Those symptoms give us a starting point. They don't necessarily tell us exactly which structure is responsible.
What Is Actually Being “Impinged”?
Historically, shoulder impingement was explained primarily as compression of the rotator cuff and other tissues beneath the acromion as the humerus elevated.
That model helped describe the location of symptoms, but shoulder pain is more complicated than simply measuring how much “space” exists underneath the acromion.
When someone tells us their shoulder feels pinched, the sensation is real. It just doesn't necessarily mean a tendon is being mechanically crushed between two bones every time the arm moves.
Several structures can contribute to this type of shoulder pain.
Rotator Cuff Tendons
The rotator cuff helps stabilize and control the humeral head while the arm moves.
The supraspinatus is particularly associated with the traditional impingement presentation, but the entire cuff contributes to shoulder control.
Rotator cuff tendinopathy can become painful when the demands placed on the tendon exceed its current capacity. That can happen after a sudden increase in training, repetitive work, throwing, pressing, or simply when the shoulder hasn't been exposed to meaningful load for a while.
Subacromial Bursa
The subacromial-subdeltoid bursa helps reduce friction between moving structures around the shoulder.
When irritated, it can be a significant pain generator and may contribute to pain during elevation or when lying directly on the shoulder.
This is where the familiar diagnosis of shoulder bursitis enters the picture.
Long Head of the Biceps Tendon
The long head of the biceps crosses the front of the shoulder and can contribute to anterior shoulder pain.
Biceps irritation may exist independently or alongside rotator cuff and other shoulder problems.
AC Joint
The acromioclavicular joint sits at the top of the shoulder. AC joint irritation tends to produce a somewhat different presentation, but it belongs in the differential diagnosis—particularly when pain is concentrated at the top of the shoulder or aggravated by reaching across the body.
The important point is that identifying a possible pain generator is only one part of understanding why the shoulder hurts.
The Shoulder Blade Matters
The shoulder isn't just the ball-and-socket glenohumeral joint.
Your scapula provides the platform from which the arm moves.
As you raise your arm, the humerus and scapula have to coordinate with one another. The scapula upwardly rotates and posteriorly tilts while muscles including the serratus anterior and trapezius help control its position.
When that coordination changes, we may see:
- Early shoulder shrugging
- Scapular winging
- Excessive anterior tilt
- Poor upward rotation
- Difficulty controlling the shoulder blade under load
- Significant differences between sides
This is often described as scapular dyskinesis.
But there's an important distinction here.
Seeing an unusual-looking shoulder blade doesn't automatically mean we've discovered the cause of someone's pain. People move differently, and scapular movement varies considerably between individuals.
Instead, we want to determine whether the scapular finding is clinically meaningful for the person standing in front of us.
If changing or assisting scapular motion makes painful humeral flexion or abduction noticeably easier, that gives us useful information.
Why Did the Shoulder Start Hurting?
This is usually the more interesting question.
Two people can both have pain when raising their arms and arrive there for completely different reasons.
One person may have recently doubled their pressing volume in the gym.
Another may lack adequate rotator cuff strength for the amount of overhead work they perform.
Someone else may have limited glenohumeral or thoracic mobility that changes how they accomplish overhead movement.
And another person may simply have a painful, sensitized rotator cuff that causes them to move differently.
That's why we don't want to automatically treat every shoulder that hurts overhead with the same handful of exercises.
How We Evaluate Shoulder Impingement at Ascent
Our first job isn't to prove that something is being pinched.
It's to determine what movements reproduce your symptoms, what structures may be contributing, and what appears to change those symptoms.
A shoulder evaluation may include range of motion, painful-arc testing, resisted rotator cuff testing, strength testing, scapular observation and assistance, cervical screening, orthopedic testing, and palpation when appropriate.
Tests such as Hawkins-Kennedy, Neer, resisted external rotation, full-can or empty-can testing can contribute information.
But no single orthopedic test gives us the entire answer.
We also want to see you move.
Can you raise the arm without compensating?
What happens to the scapula?
Can you press?
Can you pull?
How does the shoulder respond when we change the position or assist the scapula?
What happens when resistance is added?
And ultimately: what does your shoulder need to be capable of doing in your life?
A construction worker, competitive swimmer, recreational lifter, skier, climber, and someone who simply wants to sleep comfortably on their side may all require different endpoints.
Mobility → Stability → Strength → Power
Our shoulder rehabilitation follows the same general framework we use throughout Ascent:
Mobility → Stability → Strength → Power.
That doesn't mean every patient spends weeks in each stage. These qualities often overlap. The framework simply helps us avoid jumping directly into strengthening a movement that the person can't yet perform well.
Mobility
First, we determine whether a meaningful mobility restriction exists.
That could involve glenohumeral motion, thoracic mobility, or surrounding muscular restrictions.
If mobility is already adequate, there is little reason to chase more of it simply because the shoulder hurts.
Stability and Scapular Control
Next, we look at the person's ability to control the scapula and humeral head through movement.
Depending on the findings, rehabilitation might emphasize serratus function, rotator cuff control, scapular upward rotation, posterior tilt, or coordinated reaching and pressing patterns.
The goal isn't to hold the shoulder blades “back and down” all day.
The scapula is supposed to move.
We want it to move well enough to support what the arm is being asked to do.
Strength
Eventually, a painful shoulder needs to tolerate load.
That may mean that rehab focuses on progressively loading the rotator cuff, rows, carries, presses, pulldowns, landmine variations, or other movements appropriate for the individual's presentation.
This is an important transition.
Feeling better is useful.
Building a shoulder that can tolerate the activity that previously hurt is better.
Power and Return to Performance
For some patients, ordinary strength is the endpoint.
For others, it isn't.
Throwing, climbing, Olympic lifting, skiing, mountain biking, manual labor, and many sports require the shoulder to accept and produce force quickly.
Rehabilitation should eventually resemble the demands the person plans to return to.
Where Do Chiropractic and Manual Therapy Fit?
Manual therapy can be useful when examination identifies relevant restrictions or when it helps improve a painful movement.
Depending on the individual, treatment might address the shoulder itself, surrounding soft tissues, scapulothoracic region, or thoracic spine.
The important part is what happens next.
If manual treatment makes shoulder flexion easier, we have an opportunity to reinforce that change with movement.
That's why our treatment model frequently combines hands-on care with rehabilitation rather than treating them as competing approaches.
What About Shockwave Therapy?
Focused shockwave therapy can be useful for specific shoulder conditions, but we don't consider it a universal treatment for shoulder impingement.
Where it becomes particularly interesting is when the examination and/or imaging suggests chronic rotator cuff tendinopathy or calcific rotator cuff tendinopathy.
Those are different clinical questions than simply asking whether someone's shoulder hurts during abduction.
At Ascent, focused shockwave is therefore something we may integrate when the tissue diagnosis and clinical presentation support it—not something every painful shoulder automatically receives.
When Does Shoulder Pain Need Imaging or Referral?
Most shoulder pain doesn't automatically require an MRI.
There are situations, however, where imaging or referral becomes more important.
Significant trauma, substantial loss of strength, inability to actively raise the arm, suspected fracture or full-thickness rotator cuff tear, instability following dislocation, progressive neurological findings, systemic symptoms, or a shoulder that isn't progressing as expected can change the plan.
The history and examination help determine when we continue conservative management and when we need more information.
Treat the Shoulder You Have, Not Just the Diagnosis
“Shoulder impingement” can be a useful starting description.
It tells us that certain shoulder positions hurt and gives us several structures to investigate.
But it doesn't tell us the entire story.
We want to know what hurts, which movements reproduce it, how the scapula and humerus are working together, whether mobility is adequate, how much load the shoulder can tolerate, and what you ultimately need that arm to do.
This is where we think the Ascent system excels. Our physical therapists and chiropractors don't stop at identifying a painful structure or getting you through a basic set of shoulder exercises. We evaluate the movement, identify what is actually limiting it, and progress through mobility, stability, strength, and eventually performance based on what your shoulder needs.
The painful movement is the starting point.
The evaluation determines why that movement hurts—and rehabilitation builds the capacity to perform it again.
