Range of Motion: Spine Straight Leg Raise

The Straight Leg Raise Test measures how far the straight leg can be raised while the client lies supine. It can provide information about posterior thigh flexibility, hip flexion range and neural symptom response. The result should be recorded as an angle with pain score, symptom location, side comparison and whether symptoms are stretch-like or neural-type.

Introduction

A client may report posterior thigh tightness, difficulty lifting the leg, symptoms during running or discomfort during forward bending. The Straight Leg Raise Test helps quantify straight-leg hip flexion and symptom response.

The test can be used as a ROM measure, but it can also provoke neural-type symptoms. For this reason, professionals should record not only the angle, but also symptom quality, location, familiarity and response to sensitising or easing movements.

Quick Summary

Test name: Spine Straight Leg Raise Test
Also known as: SLR Test, passive straight leg raise
Purpose: Measure straight-leg hip flexion ROM and symptom response
Movement: Raising the straight leg in supine
Joint/body region: Hip, posterior thigh, lumbar spine and sciatic nerve pathway
ROM type: Passive ROM/neurodynamic response depending on interpretation
Score: Degrees of hip flexion at endpoint or symptom onset
Equipment: Inclinometer, goniometer, pain scale and Measurz
Best used with: Slump Test, 90/90 Active Knee Extension, hip flexion, lumbar ROM and neurological screen when relevant
Key limitation: SLR angle does not identify the cause of symptoms by itself

What Is the Straight Leg Raise Test?

The Straight Leg Raise Test involves raising the client’s straight leg while they lie on their back. The knee remains extended as the hip flexes.

The test can be interpreted as a posterior chain ROM measure, a hamstring flexibility measure or a neurodynamic symptom test depending on symptoms, test setup and clinical reasoning.

Why It Is Used

The test is used to assess straight-leg hip flexion range and symptom response.

It may help inform:

Posterior thigh flexibility monitoring
Hip flexion ROM assessment
Neural symptom behaviour
Side-to-side comparison
Forward bend interpretation
Running and kicking movement assessment
Progress tracking across sessions

What It Measures

The test may measure:

Straight-leg hip flexion angle
Posterior thigh stretch response
Neural-type symptom response
Pain location and symptom quality
Side-to-side difference
Irritability and symptom onset angle

It does not prove the cause of symptoms on its own.

Active vs Passive Range of Motion

The classic Straight Leg Raise Test is usually passive, with the professional lifting the limb.

Active straight leg raise is a different test and should be recorded separately if used.

Who It Is Useful For

This test may be useful for runners, field sport athletes, gym clients, dancers, clients with posterior thigh symptoms and clients where straight-leg movement, bending or neural symptoms are relevant.

Equipment Required

Treatment table or mat
Goniometer or inclinometer
Pain scale
Measurz for recording ROM and symptoms
Optional neurological screen notes
Optional comparison side notes

Step-by-Step Protocol or How to Apply This in Practice

Starting position

Position the client supine with both legs relaxed.

Client position

The non-tested leg remains flat or in the standardised position. The tested knee stays extended.

Professional position

Stand beside the tested limb and support the heel or lower leg.

Body/joint setup

Start with the hip near neutral and the knee extended.

Stabilisation

Monitor pelvic movement and opposite-leg compensation.

Movement instruction

Lift the straight leg slowly into hip flexion while keeping the knee extended.

Measurement landmarks

Measure hip flexion angle using the selected method. An inclinometer may be placed on the tibia or femur depending on protocol.

Sensitising or easing movements

If clinically relevant, ankle dorsiflexion, cervical flexion or slight knee flexion may be used to explore symptom behaviour. Record any changes clearly.

What to ask

Ask whether the client feels posterior thigh stretch, back pain, leg pain, tingling, numbness, burning or familiar symptoms.

Stopping rules

Stop if symptoms increase sharply, neurological symptoms worsen, pain is not tolerated or symptoms do not settle after testing.

What to record

Record side, angle at symptom onset, final angle, pain score, symptom location, symptom quality, knee position, sensitising response and comparison side.

Number of trials

One to three trials may be used. Avoid repeated provocative testing if symptoms are irritable.

Retest consistency

Use the same speed, endpoint, device placement, symptom criteria and sensitising method each session.

Scoring and Interpretation

The result may be recorded as:

Angle at first symptom
Angle at end range
Symptom-free ROM
Pain-limited ROM
Stretch-limited ROM
Neural symptom response

A lower SLR angle may reflect reduced posterior thigh tolerance, hip flexion range, neural mechanosensitivity, pain, guarding or measurement method. It does not identify the cause on its own.

Interpretation is stronger when paired with:

Slump Test
90/90 Active Knee Extension
Hip flexion ROM
Lumbar ROM
Neurological screen
Pain and symptom distribution
Symptom behaviour during movement

Reliability and Validity

A 2020 diagnostic validity study of neurodynamic and orthopaedic tension tests investigated Straight Leg Raise, Slump and related tests for lumbar and lumbosacral radiculopathy and supported interpreting neurodynamic tests as part of a broader cluster rather than in isolation. (mdpi.com)

A 2022 article on SLR reliability also highlights that SLR measurement depends on symptom criteria, test performance and standardisation. (sciencedirect.com)

Common Errors and Testing Limitations

Common errors include bending the knee, lifting too quickly, not recording symptom quality, forcing end range, failing to record symptom onset angle, not comparing sides and interpreting any posterior thigh stretch as neural involvement.

Limitations include symptom overlap, hamstring contribution, hip position, neural sensitivity, measurement error and client guarding.

Practical Applications

Use the Straight Leg Raise Test to track straight-leg hip flexion, posterior thigh tolerance and symptom behaviour. It is most useful when paired with active knee extension, slump testing, hip ROM, lumbar ROM and neurological findings where relevant.

How to Record This in Measurz

In Measurz, record baseline SLR angle in degrees using the inclinometer or chosen device. Record side tested, pain score, symptom location, symptom quality, angle at symptom onset, final angle, active/passive method, sensitising response and comparison side.

Track progress across sessions and add related lumbar ROM, hip flexion, active knee extension, slump or neurological findings.

Related Tests or Internal Linking Suggestions

Spine Slump Test
90/90 Active Knee Extension Test
Hip Flexion Test
Femoral Nerve Tension Test
Lumbar Flexion Test
Hamstring Bridge Test
Running Assessment
Deadlift Assessment

FAQs

What does the Straight Leg Raise Test measure?

It measures straight-leg hip flexion angle and symptom response during passive leg raising.

Is SLR a hamstring test or nerve test?

It can provide information about posterior thigh flexibility and neural symptom behaviour. Symptom quality and sensitising responses guide interpretation.

What should be recorded?

Record angle, side, pain, symptom location, symptom quality and whether symptoms change with sensitising movements.

Can SLR diagnose a condition?

No. It supports clinical reasoning but does not diagnose a condition by itself.

How should SLR be tracked?

Use the same speed, endpoint, device, symptom criteria and side comparison each session.

Key Takeaways

SLR measures straight-leg hip flexion and symptom response.
Record symptom onset angle and final angle when relevant.
Posterior thigh stretch is not the same as neural symptoms.
Interpret with Slump, AKE, hip ROM and lumbar findings.
Measurz should capture angle, symptoms, side and sensitising response.

References

Bueno-Gracia, E., et al. (2020). Use of neurodynamic or orthopedic tension tests for the diagnosis of lumbar and lumbosacral radiculopathy: Study of the diagnostic validity. International Journal of Environmental Research and Public Health, 17(19), 7046.

Clarkson, H. M. (2020). Musculoskeletal assessment: Joint range of motion, muscle testing, and function (4th ed.). Wolters Kluwer.

Scaia, V., Baxter, D., & Cook, C. (2022). Straight leg raise test reliability and clinical utility. Needs verification.