Shoulder Orthopaedic Test: Drop Arm Test

The Drop Arm Test is a shoulder special test used to assess whether the client can slowly and smoothly lower the arm from an abducted position. It is commonly used in assessment reasoning for larger or full-thickness rotator cuff tears, particularly involving the supraspinatus or posterosuperior rotator cuff.

A positive finding may include sudden dropping of the arm, inability to control lowering, marked weakness, pain inhibition, or use of compensation to lower the arm. However, the test does not confirm a rotator cuff tear on its own and should be interpreted alongside history, age, trauma mechanism, pain behaviour, resisted shoulder testing, range of motion, other rotator cuff tests and imaging where relevant.

Introduction

The Drop Arm Test is a classic shoulder special test used when rotator cuff involvement is part of the assessment reasoning. The test focuses on the client’s ability to control eccentric lowering of the arm from an abducted position.

The rotator cuff, particularly the supraspinatus and infraspinatus, contributes to shoulder elevation control and humeral head stability during arm movement. If a client cannot smoothly lower the arm, or the arm drops suddenly, this may increase suspicion of a larger rotator cuff tear or significant shoulder dysfunction.

However, the test must be interpreted carefully. Pain inhibition, fear, acute irritability, stiffness, neurological weakness, poor effort, subacromial pain, glenohumeral joint symptoms and other shoulder conditions may also affect the result.

The Drop Arm Test is generally more useful when positive than when negative. A negative test does not exclude rotator cuff pathology, especially smaller tears or pain-related presentations.

For Measurz, the key is to record whether the arm dropped, whether pain or weakness limited control, the position tested, the side tested, symptom location, pain score and related shoulder findings.

Quick Summary

Test name: Drop Arm Test / Codman’s Drop Arm Test
Region: Shoulder
Primary purpose: Assess ability to eccentrically lower the abducted arm
Commonly associated presentation: Larger or full-thickness rotator cuff tear, especially supraspinatus/posterosuperior cuff involvement
Positive finding: Arm drops suddenly, client cannot lower smoothly, or lowering is limited by marked weakness/pain
Negative finding: Client lowers the arm slowly and smoothly without familiar symptom reproduction or loss of control
Main limitation: Low sensitivity means a negative test does not exclude rotator cuff pathology.

What Is the Drop Arm Test?

The Drop Arm Test is a shoulder special test where the professional passively lifts the client’s arm into abduction, usually around 90 degrees, and then asks the client to slowly lower the arm back to the side.

The test is considered positive when the client cannot control the lowering movement, the arm drops suddenly, or the client must compensate significantly.

The test can be performed in sitting or standing.

It may be used to observe:

• Eccentric shoulder control
• Pain during lowering
• Sudden arm drop
• Weakness
• Compensatory movement
• Side-to-side difference
• Symptom reproduction

Why It Is Used

The Drop Arm Test may be used to support assessment reasoning around:

• Suspected rotator cuff tear
• Larger or full-thickness cuff involvement
• Supraspinatus or posterosuperior cuff dysfunction
• Shoulder weakness after trauma
• Inability to control arm lowering
• Painful arc or abduction-related symptoms
• Shoulder assessment after fall or lifting injury
• Differentiating pain inhibition from true loss of control
• Baseline and retest documentation in Measurz

It is most useful when combined with other rotator cuff tests and the client’s history.

What It Assesses

The Drop Arm Test assesses the client’s ability to control arm lowering from an abducted position.

It may provide information about:

• Rotator cuff-related assessment reasoning
• Eccentric shoulder control
• Abduction control
• Pain inhibition
• Marked weakness
• Symptom reproduction
• Functional shoulder elevation control
• Side-to-side difference

It does not directly assess:

• Rotator cuff tendon integrity with certainty
• Tear size with certainty
• Imaging findings
• Isolated supraspinatus function
• Shoulder joint stability
• Cervical contribution
• Scapular control in isolation
• Readiness for sport or work
• Treatment need

Who It Is Useful For

The Drop Arm Test may be useful for clients with:

• Shoulder pain
• Painful or weak shoulder abduction
• Difficulty lowering the arm
• Shoulder symptoms after trauma
• Suspected larger rotator cuff tear
• Night pain and weakness patterns requiring broader assessment
• Reduced ability to lift or control the arm
• Older adults with new shoulder weakness
• A need for clear baseline and retest documentation

It may also be useful for professionals learning how to identify loss of shoulder lowering control versus pain-limited movement.

When to Use This Test

Consider using the Drop Arm Test when:

• Rotator cuff involvement is part of the assessment reasoning
• The client reports difficulty lifting or lowering the arm
• There is shoulder weakness after trauma
• Active abduction is painful or poorly controlled
• You want to compare both shoulders
• You need to record whether weakness, pain or loss of control is the main limiting factor
• You are building a broader shoulder assessment profile

It should generally be combined with resisted external rotation, empty/full can testing, painful arc, infraspinatus testing and other shoulder assessments.

When Not to Use or When to Be Cautious

Use caution or avoid the test when:

• The client cannot safely lift or hold the arm
• Recent fracture, dislocation or major trauma is suspected
• Severe acute pain is present
• The client cannot tolerate passive abduction
• There are neurological signs requiring further assessment
• The professional cannot safely support the arm
• Recent surgery or medical advice makes the test inappropriate

Stop the test if the arm drops unexpectedly and cannot be safely controlled, pain increases sharply, or the client asks to stop.

Equipment Required

The Drop Arm Test usually requires no equipment.

Optional equipment includes:

• Measurz app
• Pain rating scale
• Shoulder range of motion record
• Strength testing record
• Video recording for movement review where appropriate
• Notes field for weakness, pain and compensation
• Muscle Meter or other strength tool if testing shoulder strength separately

Step-by-Step Protocol / Practice

Setup

Ask the client to sit or stand upright.

Explain the test:

“I am going to lift your arm out to the side, then I want you to slowly lower it back down. Tell me if you feel pain, weakness or loss of control.”

Test the less symptomatic side first if appropriate.

Client position

The client sits or stands with:

• Trunk upright
• Shoulder relaxed initially
• Arm by the side
• Elbow extended or slightly flexed depending on comfort
• Thumb position recorded if relevant
• No trunk leaning or shrugging where possible

Examiner/professional position

The professional stands beside the tested arm.

The professional should be close enough to support the arm if it drops.

Hand placement

The professional passively abducts the client’s arm, supporting around the distal humerus or wrist/forearm as needed.

Avoid painful gripping.

Stabilisation

The trunk should remain upright.

Avoid allowing the client to lean, shrug excessively or rotate the body to control the movement.

Movement or force direction

Passively lift the arm into approximately 90 degrees of shoulder abduction.

Ask the client to slowly lower the arm to the side under control.

The lowering phase should be smooth and controlled.

Instructions

Tell the client:

“Slowly lower your arm back down to your side. Try to control the movement. Tell me if pain, weakness or loss of control limits you.”

Positive finding

A positive finding may include:

• Arm drops suddenly
• Client cannot lower the arm slowly
• Marked loss of control
• Significant weakness during lowering
• Familiar shoulder pain prevents controlled lowering
• Shoulder shrugging or trunk compensation is required
• Clear difference compared with the other side

Record whether the positive result was due to pain, weakness, sudden drop or compensation.

Negative finding

A negative finding may include:

• Arm lowers smoothly
• No sudden drop
• No meaningful side-to-side difference
• No familiar symptom reproduction
• No major compensation
• Movement is controlled through the lowering phase

A negative finding does not fully exclude rotator cuff pathology.

Stopping criteria

Stop the test if:

• The arm drops suddenly and cannot be controlled safely
• Pain increases sharply
• The client cannot tolerate the starting position
• Neurological symptoms are reported
• The client asks to stop
• The professional cannot safely support the limb

Safety notes

The professional should be prepared to support the arm. Do not let the arm fall uncontrolled, especially in painful or weak presentations.

Positive and Negative Test Interpretation

A positive Drop Arm Test may increase suspicion of a larger or full-thickness rotator cuff tear, particularly when there is clear loss of eccentric control, weakness after trauma, or a sudden drop rather than pain alone.

However, a positive test does not confirm a rotator cuff tear. Pain inhibition, fear, poor effort, stiffness, neurological weakness, glenohumeral pain, subacromial pain and other factors can affect lowering control.

A negative Drop Arm Test may suggest that the client can control arm lowering in that position. However, because the test tends to have low sensitivity, a negative result does not exclude rotator cuff pathology, smaller tears, tendinopathy or pain-related shoulder dysfunction.

The finding is more meaningful when interpreted with:

• Age
• Trauma mechanism
• Night pain or weakness history
• Active shoulder range of motion
• Passive shoulder range of motion
• Resisted abduction
• Resisted external rotation
• Painful arc
• Infraspinatus test
• External Rotation Lag Sign
• Shoulder imaging where relevant
• Cervical screen where relevant

Sensitivity, Specificity and Diagnostic Accuracy

Diagnostic accuracy values vary across studies, rotator cuff tear definitions and reference standards.

Overall, the Drop Arm Test is commonly described as having low sensitivity and higher specificity for larger or full-thickness rotator cuff tears. This means a positive result may increase suspicion, but a negative result does not confidently exclude rotator cuff involvement.

Condition or presentation: Rotator cuff tear, especially full-thickness or posterosuperior cuff tear
Population: Shoulder pain and suspected rotator cuff tear populations across studies
Test variation: Standard Drop Arm Test / Drop Arm Sign
Reference standard: Imaging, arthroscopy or surgical findings depending on study
Sensitivity: Often reported as low in pooled or review evidence
Specificity: Often reported as moderate to high
Positive likelihood ratio: More useful when test is clearly positive, especially in a relevant history
Negative likelihood ratio: Usually not strong enough to exclude rotator cuff pathology
Key limitations: Different tear sizes, different tendon involvement, variable age groups, inconsistent positive-test criteria and different reference standards.

Plain-language interpretation:

• A positive Drop Arm Test may increase suspicion of a larger rotator cuff tear.
• A negative Drop Arm Test does not rule out a rotator cuff tear.
• The test is more useful when combined with other rotator cuff tests.
• Pain-only findings should be interpreted more cautiously than true loss of control.

Reliability and Validity

Reliability depends on consistent starting position, instruction and positive-test criteria.

Reliability may be affected by:

• Shoulder abduction angle
• Arm rotation position
• Client pain
• Client effort
• Professional support
• Whether pain or sudden drop is counted as positive
• Client fear or guarding
• Interpretation of compensation

Validity is stronger when the test is used to identify meaningful loss of shoulder lowering control in suspected larger rotator cuff tears. Validity is weaker when the test is used broadly for all shoulder pain presentations.

Reliability improves when the professional records:

• Starting angle
• Arm position
• Pain score
• Whether arm dropped suddenly
• Whether weakness or pain limited the test
• Compensation
• Comparison side
• Test confidence

Common Errors and Limitations

Common errors include:

• Not supporting the arm safely
• Starting at an inconsistent abduction angle
• Counting mild pain as a clear positive
• Not separating pain from weakness
• Not recording compensation
• Not comparing sides
• Allowing trunk lean or shoulder shrugging
• Assuming a positive test confirms a tear
• Assuming a negative test excludes a tear
• Not combining with other shoulder tests

Limitations include:

• Low sensitivity
• Pain inhibition can mimic weakness
• Smaller tears may not produce a positive test
• Neurological weakness may influence the result
• Test performance varies
• A single test should not guide decisions alone

Practical Applications

The Drop Arm Test may be useful for:

• Rotator cuff assessment reasoning
• Identifying loss of arm-lowering control
• Screening for larger cuff involvement
• Comparing sides
• Baseline and retest documentation
• Supporting client education
• Deciding whether further assessment may be appropriate

In Measurz, it can be recorded alongside shoulder range of motion, resisted abduction, resisted external rotation, painful arc, infraspinatus testing, Internal Rotation Lag Sign, cervical screening and functional shoulder tasks.

How to Record This in Measurz

Record:

• Test name: Drop Arm Test
• Side tested
• Starting angle
• Arm position
• Result: positive, negative, unclear or unable to test
• Pain score
• Symptom location
• Symptom quality
• Sudden drop: yes or no
• Weakness: none, mild, moderate or marked
• Pain-limited versus weakness-limited
• Compensation: shrug, trunk lean or other
• Comparison side
• Irritability
• Reason for stopping if relevant
• Related findings
• Confidence in interpretation
• Further assessment or referral notes if appropriate
• Retest date if relevant

Recording these details improves repeatability, communication, client education, assessment reasoning, monitoring over time, team consistency and reporting quality.

Related Tests / Internal Links

• Empty Can Test
• Full Can Test
• Painful Arc
• External Rotation Lag Sign
• Internal Rotation Lag Sign
• Infraspinatus Test
• Lift-Off Test
• Belly Press Test
• Scapular Assistance Test
• Cervical Quadrant Test
• Shoulder Range of Motion
• Shoulder Strength Testing

FAQs

What does the Drop Arm Test assess?

It assesses the client’s ability to slowly lower the abducted arm under control.

What is a positive Drop Arm Test?

A positive finding may include sudden dropping of the arm, inability to lower smoothly, marked weakness, pain-limited control or major compensation.

Does a positive Drop Arm Test diagnose a rotator cuff tear?

No. It may increase suspicion, especially for a larger tear, but it does not confirm a tear on its own.

Does a negative Drop Arm Test exclude a rotator cuff tear?

No. The test has low sensitivity, so a negative result does not exclude rotator cuff involvement.

Is pain alone enough to call it positive?

Pain should be recorded, but true loss of control or marked weakness is usually more meaningful than pain alone.

Should the test be done sitting or standing?

Either may be used, but the position should be recorded and repeated consistently.

Should both shoulders be tested?

Yes, side-to-side comparison improves interpretation.

What should it be combined with?

History, active and passive range of motion, resisted testing, painful arc, other rotator cuff tests and cervical screening where relevant.

Key Takeaways

The Drop Arm Test assesses control during shoulder lowering from abduction.

It is commonly used in rotator cuff assessment reasoning, especially for larger/full-thickness tears.

A positive finding may increase suspicion, but it does not confirm a tear.

A negative result does not exclude rotator cuff pathology.

Pain, weakness and compensation should be recorded separately.

Measurz recording should include side, starting angle, pain score, sudden drop, weakness, compensation and comparison side.

References

Hermans, J., Luime, J. J., Meuffels, D. E., Reijman, M., Simel, D. L., Bierma-Zeinstra, S. M. A. (2013). Does this patient with shoulder pain have rotator cuff disease? The rational clinical examination systematic review. JAMA, 310(8), 837–847. https://doi.org/10.1001/jama.2013.276187

Jain, N. B., Luz, J., Higgins, L. D., Dong, Y., Warner, J. J. P., Matzkin, E., Katz, J. N., & Katz, J. N. (2017). The diagnostic accuracy of special tests for rotator cuff tear: The ROW Cohort Study. American Journal of Physical Medicine & Rehabilitation, 96(3), 176–183. https://doi.org/10.1097/PHM.0000000000000566

Park, H. B., Yokota, A., Gill, H. S., El Rassi, G., & McFarland, E. G. (2005). Diagnostic accuracy of clinical tests for the different degrees of subacromial impingement syndrome. The Journal of Bone and Joint Surgery. American Volume, 87(7), 1446–1455. https://doi.org/10.2106/JBJS.D.02335

Rosas, S., Krill, M. K., Amoo-Achampong, K., Kwon, K., Nwachukwu, B. U., & McCormick, F. (2019). A practical, evidence-based, comprehensive shoulder examination for diagnosing pathology. The Physician and Sportsmedicine, 47(2), 128–136. https://doi.org/10.1080/00913847.2018.1554162

Sgroi, M., Loitsch, T., Reichel, H., & Kappe, T. (2019). Diagnostic value of clinical tests for supraspinatus tendon tears. Arthroscopy, Sports Medicine, and Rehabilitation.