Shoulder Orthopaedic Test: Gerbers Test

Gerber’s Test, or the Lift-Off Test, assesses whether the client can lift the hand away from the lower back against gravity or resistance. A positive finding may include inability to lift off, weakness, compensation or familiar pain compared with the other side. A 2022 systematic review and meta-analysis found that subscapularis tests, including the Lift-Off Test, generally have high specificity but low sensitivity, so a negative test does not rule out subscapularis involvement.  

Introduction

A client reports anterior shoulder pain, weakness with internal rotation or difficulty reaching behind the back. They may also have trouble with pushing, pressing or tucking in a shirt.

Gerber’s Test helps assess subscapularis-biased internal rotation in a hand-behind-back position. The result should be interpreted with shoulder mobility, pain, strength, compensation and related subscapularis tests.

Quick Summary

Test name: Gerber’s Test
Also known as: Lift-Off Test
Body region: Shoulder, rotator cuff, subscapularis
Purpose: Assess subscapularis function and internal rotation strength
Positive finding: Inability to lift the hand away from the back, weakness, compensation or familiar pain
Negative finding: Able to lift and hold the hand away without meaningful weakness or symptoms
Best used with: Belly Press Test, Bear Hug Test, Internal Rotation Lag Sign, shoulder ROM and internal rotation strength testing
Key limitation: Requires enough shoulder internal rotation and extension to reach the test position

What Is Gerber’s Test?

Gerber’s Test is performed with the client’s hand placed behind the lower back. The client attempts to lift the hand away from the back, using shoulder internal rotation.

If the client cannot reach the test position, the test may not be appropriate and another subscapularis test, such as Belly Press or Bear Hug, may be more useful.

Why It Is Used

The test is used when subscapularis involvement is part of the clinical reasoning.

It may help assess anterior shoulder pain, internal rotation weakness, rotator cuff involvement and difficulty with behind-the-back tasks.

What It Assesses

The test assesses active internal rotation strength in a specific shoulder position. It does not isolate the subscapularis perfectly and does not confirm a tear on its own.

Weakness may also reflect pain inhibition, stiffness, limited shoulder extension, posterior shoulder restriction, poor effort or broader rotator cuff involvement.

Who It Is Useful For

This test may be useful for clients with anterior shoulder pain, internal rotation weakness, suspected rotator cuff involvement or difficulty reaching behind the body.

When to Use This Test

Use when the client can comfortably place the hand behind the back.

When Not to Use or When to Be Cautious

Use caution when the client cannot reach behind the back, has acute shoulder trauma, recent surgery, suspected fracture, severe pain, high irritability or symptoms that worsen with resisted movement.

Equipment Required

Chair or standing space
Pain and strength scale
Measurz recording workflow
Optional comparison side notes

Step-by-Step Protocol / Practice

Setup

Position the client sitting or standing.

Client position

Ask the client to place the back of the hand against the lower back.

Examiner position

Stand behind or beside the client.

Hand placement

Observe the hand, elbow, shoulder and trunk. Manual resistance may be added if appropriate.

Stabilisation

Prevent trunk rotation, shoulder shrugging or elbow compensation.

Movement or force direction

Ask the client to lift the hand away from the back. If testing resistance, apply gentle pressure toward the back while the client holds the lift-off position.

Instructions

Ask the client to report pain, weakness, apprehension or familiar symptoms.

Positive finding

A positive finding is inability to lift the hand away, weakness, loss of position, compensation or familiar pain compared with the other side.

Negative finding

A negative finding is the ability to lift and hold the hand away without meaningful weakness or familiar symptoms.

Stopping criteria

Stop if pain increases sharply, the position is not tolerated or compensation dominates.

Safety notes

Do not force the hand-behind-back position. Record if the test is unable to be performed due to mobility limitation.

Positive and Negative Test Interpretation

A positive Gerber’s Test may increase suspicion of subscapularis involvement when weakness or inability to lift off is clear and supported by other internal rotation tests.

A negative test does not rule out subscapularis involvement. Smaller tears, partial tears or pain-inhibited presentations may not be detected.

Interpretation is stronger when combined with Belly Press, Bear Hug, Internal Rotation Lag Sign, shoulder ROM, internal rotation strength and history.

Sensitivity, Specificity and Diagnostic Accuracy

A 2022 systematic review and meta-analysis reported that Lift-Off, Belly Press, Bear Hug and Internal Rotation Lag Sign tests all had pooled specificity above 0.90 but pooled sensitivity below 0.60. The authors concluded that no single clinical test is sufficiently reliable to diagnose subscapularis tears.  

This means a clearly positive Gerber’s Test may increase suspicion, but a negative test cannot confidently rule out subscapularis involvement.

Reliability and Validity

Reliability depends on consistent hand placement, resistance direction, comparison side, symptom criteria and whether the result is recorded as pain, weakness, inability to lift off or inability to reach the position.

Common Errors and Limitations

Common errors include forcing the hand behind the back, failing to record inability to reach the position, using too much resistance, not comparing sides and treating a negative result as a rule-out.

Limitations include low sensitivity, mobility requirements, pain inhibition, effort variation, compensation and limited ability to isolate subscapularis perfectly.

Practical Applications

Use Gerber’s Test to document hand-behind-back internal rotation strength and symptom response. It is most useful when paired with other subscapularis tests and ROM findings.

How to Record This in Measurz

Record test name, side tested, result, pain score, symptom location, ability to reach test position, ability to lift off, weakness yes/no, resistance level, compensation, comparison side, confidence in result and reason for stopping.

Add related findings such as Belly Press, Bear Hug, Internal Rotation Lag Sign, shoulder internal rotation ROM, shoulder extension ROM and rotator cuff strength.

Related Tests / Internal Links

Belly Press Test
Bear Hug Test
Internal Rotation Lag Sign
Shoulder Internal Rotation Test
Shoulder Extension Test
Shoulder Strength Testing
Empty Can Test
Full Can Test

FAQs

What does Gerber’s Test assess?

It assesses subscapularis-biased shoulder internal rotation strength in a hand-behind-back position.

What is a positive Gerber’s Test?

Inability to lift the hand away, weakness, compensation or familiar pain compared with the other side.

What if the client cannot reach behind the back?

Record the test as unable to perform due to position limitation and use another subscapularis test if appropriate.

Can it diagnose a subscapularis tear?

No. It may increase suspicion but does not diagnose a tear on its own.

Can a negative test rule out a tear?

No. Subscapularis tests generally have low sensitivity.

Key Takeaways

Gerber’s Test assesses internal rotation lift-off ability.
It requires enough shoulder mobility to reach the position.
A positive test may increase suspicion of subscapularis involvement.
A negative result does not rule out a tear.
Measurz should capture position tolerance, lift-off ability, pain and weakness.

References

Lädermann, A., Denard, P. J., Collin, P., et al. (2022). Diagnostic accuracy of clinical tests for subscapularis tears: A systematic review and meta-analysis. Orthopaedic Journal of Sports Medicine, 10(2), 23259671211042011.