The Scarf Test is commonly used to assess AC joint-related pain by placing the shoulder into cross-body adduction. This article outlines the protocol, interpretation, limitations and practical use within shoulder assessment.
AC joint-related shoulder pain often presents with:
pain during cross-body movements
discomfort during pressing
superior shoulder tenderness
pain during overhead or horizontal adduction tasks
The Scarf Test is one of the most commonly used shoulder orthopaedic assessments for reproducing AC joint symptoms through cross-body adduction.
It is commonly used alongside:
Paxinos Test
AC joint palpation
O’Brien’s Test
shoulder ROM assessment
loading history and symptom presentation
Although a positive result may increase suspicion of AC joint involvement, it should not be used in isolation for diagnosis.
Primary purpose: Assess AC joint symptom provocation via cross-body adduction
Body region: Shoulder
Commonly associated with: AC joint irritation
Positive finding: Reproduction of familiar superior shoulder pain
Negative finding: No AC joint symptom reproduction
Clinical role: Supports AC joint assessment reasoning
Best interpreted with: Palpation, symptom history and additional shoulder tests
The Scarf Test is a shoulder assessment where the arm is passively or actively moved across the body into horizontal adduction, placing stress on the acromioclavicular joint.
The test is used to:
compress the AC joint indirectly
reproduce superior shoulder pain
assess tolerance to cross-body loading
support AC joint clinical reasoning
The Scarf Test may help:
identify AC joint irritation
reproduce familiar pain patterns
assess cross-body loading tolerance
support shoulder assessment clusters
guide exercise modification and progression
It is particularly relevant in:
contact athletes
gym-based populations
overhead athletes
clients with pressing-related shoulder pain
The test evaluates:
AC joint symptom provocation
tolerance to cross-body adduction
superior shoulder pain response
local joint irritability
A positive finding may indicate AC joint involvement, but it does not confirm structural pathology independently.
The Scarf Test may be useful for:
exercise professionals
sports performance settings
shoulder screening environments
allied health assessment contexts
overhead athlete monitoring
Consider using the Scarf Test when a client reports:
superior shoulder pain
pain during bench press or pressing
discomfort during cross-body movement
tenderness over the AC joint
pain after shoulder contact injury
The test becomes more meaningful when combined with:
Paxinos Test
AC joint palpation
symptom history
loading assessment
Use caution when:
acute fracture is suspected
severe pain is present
recent shoulder trauma occurred
symptoms are highly irritable
Stop testing if:
pain becomes excessive
guarding increases significantly
neurological symptoms occur
None required
Optional examination plinth or chair
Client sits or stands in a relaxed position.
Shoulder is flexed to approximately 90 degrees.
Arm is then horizontally adducted across the body.
Stabilise scapula if needed
Control speed and range of movement
Observe symptom response
Ask the client to:
report familiar pain
describe exact location
note differences between sides
A positive Scarf Test may involve:
reproduction of AC joint pain
superior shoulder discomfort
sharp or localised joint pain
reduced tolerance to cross-body adduction
A negative finding involves:
no reproduction of familiar symptoms
comfortable cross-body movement
A positive Scarf Test may suggest:
AC joint irritation
cross-body loading sensitivity
local joint involvement
It becomes more meaningful when combined with:
Paxinos Test positivity
AC joint tenderness
pain during pressing or adduction
However, it does not confirm structural pathology.
A negative test may reduce likelihood of AC joint involvement in that movement pattern, but:
AC joint pathology may still exist
symptoms may be position-specific
further testing may still be required
There are no established normative values for the Scarf Test.
Interpretation is based on:
symptom reproduction (yes/no)
pain location
severity comparison side-to-side
consistency across repeated testing
Practical benchmarks include:
reduced pain over time
improved cross-body tolerance
comparison with baseline symptoms
Evidence suggests AC joint tests vary in reliability depending on:
examiner technique
symptom irritability
interpretation criteria
The Scarf Test is best used in combination with:
other AC joint tests
palpation findings
symptom history
rather than as an isolated diagnostic tool.
Published values vary across studies and populations. In general:
single AC joint tests show variable accuracy
combined testing clusters improve diagnostic confidence
The Scarf Test should be interpreted as part of a cluster rather than independently.
Common errors:
forcing end-range adduction too quickly
poor scapular control
over-interpreting pain alone
not comparing sides
Limitations:
overlap with other shoulder conditions
symptom variability
limited stand-alone diagnostic value
The Scarf Test can help:
identify AC joint symptom behaviour
guide load modification
monitor recovery over time
support exercise prescription decisions
track cross-body movement tolerance
Record:
Test name: Scarf Test
Side tested
Positive / negative / unclear
Pain location
Pain score
Range tolerated
Comparison side response
Associated tests (Paxinos, palpation)
Movement limitations
Retest date
Paxinos Test
O’Brien’s Test
AC Joint Palpation
Painful Arc
Load and Shift Test
It assesses AC joint symptom provocation during cross-body adduction.
No. It supports clinical reasoning but does not confirm pathology.
Reproduction of familiar superior shoulder or AC joint pain during cross-body movement.
No. It is most useful when combined with other AC joint assessments.
The Scarf Test assesses AC joint irritation through cross-body adduction
Positive findings indicate symptom provocation, not diagnosis
Best used alongside other AC joint tests
Interpretation relies on symptom reproduction and comparison
Reliability improves when used as part of a test cluster
Cook, C., & Hegedus, E. J. (2021). Orthopedic physical examination tests: An evidence-based approach (3rd ed.). Pearson.
Krill, M. K., Borchers, J. R., & Hoffman, J. T. (2018). Physical examination of the shoulder. Sports Health, 10(4), 366–371. https://doi.org/10.1177/1941738118765734
Morrow, E. K., Morris, J. H., & Struyf, F. (2020). Clinical examination and physical assessment of shoulder pain. British Journal of Sports Medicine, 54(20), 1208–1215. https://doi.org/10.1136/bjsports-2019-101168
