Shoulder impingement is tested through a series of physical maneuvers that reproduce your pain by compressing the tendons and bursa in the narrow space between your upper arm bone and the bony roof of your shoulder. No single test confirms impingement on its own. Instead, clinicians use a cluster of three or more tests together, which can push diagnostic accuracy as high as 95%. Understanding these tests helps you know what to expect during an exam and what the results actually mean.
What Gets Compressed and Why It Hurts
The space between the top of your upper arm bone (humerus) and the bony shelf above it (acromion) is only about 7 to 14 millimeters in a healthy shoulder. Packed into that small gap are the rotator cuff tendons, the long head of the biceps tendon, a fluid-filled cushion called the bursa, and a ligament. When you raise your arm, these soft tissues can get pinched against the bone above them. Repeated pinching leads to irritation, swelling, and pain, especially during overhead movements.
Because the space is already tight, even mild swelling narrows it further, creating a cycle where inflammation causes more compression, which causes more inflammation. That’s why impingement pain tends to worsen gradually over weeks rather than appearing suddenly.
The Neer Test
The Neer test is one of the most commonly used impingement maneuvers. Your examiner stabilizes your shoulder blade with one hand, then uses the other hand to lift your arm straight forward and overhead while keeping it rotated inward (thumb pointing down). This motion forces the rotator cuff tendons up against the acromion. If this reproduces your familiar shoulder pain, the test is positive.
The Neer test picks up impingement about 79% of the time (sensitivity) and correctly rules it out in roughly 63% of people without the condition (specificity). Those numbers mean it’s a reasonable screening tool but not definitive by itself, which is why it’s always paired with other tests.
The Hawkins-Kennedy Test
For this test, your examiner lifts your arm to 90 degrees in front of you (shoulder height), then quickly rotates your forearm downward toward the floor. This internal rotation jams the rotator cuff tendons against a ligament inside the subacromial space. Pain during the rotation is a positive result.
The Hawkins-Kennedy test is quite sensitive, catching around 80 to 90% of cases depending on whether the underlying problem is tendon irritation or an actual tear. Its trade-off is low specificity: it tends to come back positive even in some people who don’t have impingement, which again is why it works best as part of a test cluster rather than a standalone diagnosis.
The Painful Arc Sign
This is the simplest test and one you can observe on your own. Slowly raise your arm out to the side in a wide arc. If you feel pain specifically between about 60 and 120 degrees of elevation, that’s a classic painful arc. The pain typically eases once your arm passes above 120 degrees or drops below 60 degrees.
That 60 to 120 degree window is significant because it’s the range where the rotator cuff tendons are most compressed under the acromion. Pain that starts earlier (below 60 degrees) or later (above 120 degrees) may point to a different problem, such as a joint issue rather than subacromial compression.
The Empty Can (Jobe’s) Test
This test targets the supraspinatus, the rotator cuff tendon most commonly affected by impingement. Your examiner asks you to hold both arms out at about 90 degrees, angled slightly forward, with your thumbs pointing toward the floor, as if pouring out a can. Then they push down on your arms while you resist.
What matters here is whether you experience pain, weakness, or both. Pain without significant weakness suggests tendon irritation from impingement. Weakness, especially an inability to hold your arm up against resistance, raises concern for an actual rotator cuff tear. This distinction is one of the key ways clinicians begin to separate impingement from a more serious structural problem.
Why Test Clusters Matter More Than Single Tests
Research by Park and colleagues found that combining three specific tests produces far better accuracy than any individual maneuver. When the Hawkins-Kennedy test, the painful arc sign, and a strength test of the infraspinatus muscle (one of the rotator cuff muscles that rotates your arm outward) are all positive, the probability of impingement reaches 95%. If all three are negative, impingement becomes very unlikely.
A different combination of tests, the painful arc, the drop-arm sign (where you slowly lower your arm from overhead and can’t control the descent), and the infraspinatus strength test, yields a 91% probability of a full-thickness rotator cuff tear when all three are positive. So the specific combination tells the examiner not just whether something is wrong, but what type of problem is most likely.
Current Dutch Orthopaedic Association guidelines formally recommend using a cluster of physical tests rather than relying on any single maneuver. This cluster approach is the diagnostic standard before any imaging is ordered.
When Imaging Comes Into Play
Most cases of shoulder impingement are diagnosed through physical examination alone. Imaging is reserved for specific situations. Ultrasound is recommended when there’s clinical suspicion of a partial or full-thickness rotator cuff tear, typically when strength testing reveals notable weakness rather than just pain. MRI is considered if ultrasound isn’t available or the results are inconclusive.
Standard X-rays can show the size of the subacromial space and reveal bone spurs that contribute to impingement, but they can’t visualize soft tissue damage. So an X-ray might support the diagnosis by showing a narrowed space, while an MRI or ultrasound confirms whether the tendons themselves are damaged.
Impingement vs. Rotator Cuff Tear
These two conditions overlap significantly, and some researchers argue that “impingement” is really just an earlier point on the same spectrum as rotator cuff disease. In practical terms, the key difference during testing comes down to pain versus weakness. Impingement typically produces pain with preserved strength: the tests hurt, but you can still resist the examiner’s pressure. A rotator cuff tear more often produces both pain and measurable weakness, particularly an inability to hold your arm in certain positions against downward force.
That said, the distinction isn’t always clean. A badly inflamed tendon can cause pain-related weakness even without a tear, and small tears sometimes cause minimal weakness. This is exactly why clinicians rely on multiple tests together and add imaging when the picture is unclear.
What to Expect During Your Exam
A thorough shoulder impingement evaluation typically takes 10 to 15 minutes. Your examiner will move your arm through several positions, some passively (they move it for you) and some against resistance (you push while they resist). Expect some of these maneuvers to reproduce your pain. That’s the point. A positive test means the maneuver recreated your symptoms, which helps confirm the diagnosis.
You’ll likely be asked to raise your arms, rotate them inward and outward, and resist downward pressure in various positions. The examiner is looking for a consistent pattern: pain in the impingement range, positive provocation tests, and maintained strength. If your results fit that pattern across three or more tests, the diagnosis is usually confident without needing an MRI.