The Hip Extension Strength Test measures how much force a client can produce when moving the thigh backward against resistance. It is commonly used to assess hip extensor force output in a controlled isometric setup.

Hip extension strength can provide useful context for walking, running, sprinting, jumping, climbing stairs, squatting, lifting, bridging, acceleration, lower-limb strength profiling and progress tracking. The main contributors include gluteus maximus, hamstrings and adductor magnus, with trunk and pelvis control also influencing the test.

The Muscle Meter is a handheld dynamometry tool used to measure force output during push, pull and isometric strength assessments. When used on its own, the Muscle Meter primarily measures peak force, which is the highest force value produced during the test. When used with Measurz, Muscle Meter data can be recorded and analysed with a broader set of strength and force-time metrics, including peak force, impulse, torque, rate of torque development, rate of force development, time to peak and fatigue index.

For routine hip extension testing, peak force is usually the main metric. Force as a percentage of body weight may be useful if directly calculated from the client’s test force and body weight, especially for baseline comparison, side-to-side comparison and retesting. Rate of force development and time to peak may be useful when rapid hip extension force matters, such as sprinting, jumping, acceleration or change of direction. Impulse may be useful if sustained hip extension force over a defined time window is intentionally tested. Fatigue index is only relevant if repeated or sustained hip extension efforts are part of the protocol.

The result can support assessment reasoning and progress tracking, but it does not diagnose gluteal weakness, hamstring injury, hip pathology, lower-back pain source, nerve involvement or readiness for sport or work on its own.

What Is the Hip Extension Strength Test?

The Hip Extension Strength Test is an isometric lower-limb strength assessment where the client pushes the thigh backward into the Muscle Meter, strap or fixed setup without visible hip movement. The device is usually placed against the posterior thigh, commonly near the distal thigh above the knee depending on the chosen protocol.

The movement direction is hip extension. The purpose of the test is to measure how much backward thigh force the client can produce through the hip in a specific position.

Consistent setup matters because trunk position, pelvis position, hip angle, knee angle, device placement, strap angle, limb position and client effort can all affect the result. This test measures force output in a specific setup. It does not fully measure running ability, jumping ability, lifting capacity, gait, endurance, power, pain source, movement control or sport/work readiness on its own.

Step-by-Step Protocol / Practice

1. Prepare the client

Explain that the test measures how strongly they can push the thigh backward into the Muscle Meter. Record baseline symptoms, hip discomfort, posterior thigh symptoms, hamstring symptoms, lower-back symptoms, fatigue, recent training or work exposure and confidence with maximal effort.

Use at least one submaximal practice trial so the client understands the direction of force and learns to push without trunk, pelvis or knee compensation.

2. Set the client position

A common setup is prone, prone-standing, standing or supine bridging-style testing depending on the available equipment and the assessment question. Prone or prone-standing testing may help isolate hip extension force, while standing or bridge-style setups may be more task-specific but can introduce more compensation.

Record:

• Prone, prone-standing, standing, supine or other position
• Test side
• Hip angle
• Knee angle
• Pelvis position
• Trunk position
• Foot position
• Device contact point
• Whether a strap or fixed anchor was used

For prone testing, the pelvis should remain stable against the table. For standing testing, the trunk should remain controlled. For bridge-style testing, record whether the result reflects unilateral or bilateral effort.

3. Set up the device or straps

For a handheld setup, the professional holds the Muscle Meter against the posterior thigh while the client pushes backward into it. For stronger clients or improved repeatability, a strap-stabilised or fixed setup may be used.

If using a strap, record:

• Anchor point
• Strap angle
• Strap length
• Device position
• Limb position
• Whether any pre-tension was used
• Whether the anchor moved during testing

Push, pull, handheld and strap-stabilised scores should be recorded separately unless the protocol supports direct comparison.

4. Place the device, strap or handle

Place the Muscle Meter against the posterior thigh, commonly near the distal thigh above the knee. Use the same contact point at retest. Avoid uncomfortable pressure over bony or sensitive areas.

The force direction should be hip extension. The client should push the thigh backward into the device without arching the lower back, rotating the pelvis or changing knee position.

5. Stabilise the position

Stabilise the pelvis and trunk so the client does not compensate with lumbar extension, pelvic rotation, trunk leaning, knee flexion, knee extension, ankle movement or pushing through the opposite leg.

The aim is controlled hip extension force in the chosen position.

6. Give clear instructions

Use consistent instructions such as:

“Push your thigh backward into the device as hard as you can and hold.”
“Build up smoothly, then push hard.”
“Keep your pelvis and trunk still.”
“Do not arch your lower back or twist your body.”
“Keep breathing.”
“Tell me if you feel pain, cramping, tingling or anything unusual.”

Use the same wording at retest where possible.

7. Record trials

Use 1–2 practice trials, then record 2–3 maximal trials. A common contraction duration is 3–5 seconds. Rest for 30–60 seconds between trials, or longer if symptoms, fatigue or cramping occur.

Record whether the final score uses the best trial or the average of recorded trials. Either approach may be used if it is applied consistently.

8. Identify invalid trials

Repeat or mark a trial as invalid if:

• The trunk leans or rotates
• The pelvis lifts, tilts or rotates
• The lower back arches to create force
• The hip angle changes before the effort
• The knee angle changes
• The device slips
• The strap or anchor moves
• The client pushes through the opposite leg
• Pain or cramping limits effort
• The client starts before the device is ready
• The client holds their breath excessively
• The professional cannot hold the device steady

9. Record symptoms

Record hip pain, posterior thigh symptoms, hamstring symptoms, lower-back symptoms, cramping, paraesthesia, confidence, apprehension and symptom response after testing. Do not repeatedly test through high pain, worsening symptoms or strong cramping.

For retesting, match the same position, device placement, strap setup, instructions, contraction duration, rest period, scoring method and symptom recording.

Why It Is Used

The Hip Extension Strength Test is used to quantify hip extensor force output in a repeatable setup. It may be useful for:

• Baseline lower-limb strength assessment
• Side-to-side comparison
• Monitoring change over time
• Hip extensor strength profiling
• Comparing extension with flexion where relevant
• Supporting walking, running, sprinting and jumping assessment reasoning
• Supporting lifting, squatting, bridging and stair assessment reasoning
• Workplace context where lifting, stairs, carrying or repeated hip extension tasks are relevant
• Fitness and performance progress tracking
• Client education

The test should support assessment reasoning. It should not be used as a stand-alone diagnostic or clearance measure.

What It Measures

The test primarily measures isometric hip extension force output in the chosen setup. It reflects the client’s ability to produce backward thigh force through the hip extensors while controlling pelvis and trunk position.

It may provide useful information about:

• Hip extension force capacity
• Gluteal and posterior-chain force contribution
• Side-to-side force difference
• Extension-to-flexion comparison
• Confidence producing hip extensor force
• Pain response during resisted hip extension
• Change in force over time
• Relationship between strength and related movement tasks

It does not directly measure:

• Cause of hip, hamstring or back pain
• Hamstring tissue status
• Gluteal activation quality
• Hip joint pathology
• Nerve involvement
• Running capacity
• Lifting ability
• Endurance
• Readiness to return to sport or work

Understanding the Result, Reference Values and What to Look For

What a higher or lower result may suggest

A higher score may suggest greater hip extension force output in that specific test setup. A lower score may suggest reduced hip extension force output, but the reason should be interpreted carefully.

Lower force may be influenced by pain, apprehension, poor familiarisation, fatigue, guarding, inconsistent device placement, poor pelvis stabilisation, reduced confidence, lower-back symptoms, hamstring symptoms or compensation from the trunk or opposite limb.

One result should not be interpreted in isolation. Interpretation is strongest when the same setup is repeated over time and reviewed alongside symptoms, confidence, hip range of motion, flexion strength, single-leg balance, gait, running exposure, jumping, lifting or work-specific tasks.

What can influence the result

Important influences include:

• Pain
• Apprehension
• Poor familiarisation
• Fatigue
• Guarding
• Poor pelvis or trunk stabilisation
• Lumbar extension compensation
• Pelvis rotation
• Different hip angle
• Different knee angle
• Different device placement
• Different strap angle
• Opposite-leg contribution
• Breath holding
• Client confidence
• Professional strength if using handheld resistance

Normative, reference and comparative values

Published Muscle Meter-specific universal norms for hip extension are limited. Reference values should therefore be used as context only and not as direct targets unless the protocol is closely matched.

More user-friendly comparison data include:

• In a sample of 52 women aged 20–29 years, hip extensor force measured with handheld dynamometry was reported at approximately 27.04% of body weight. This means a 70 kg person in a similar setup would produce roughly 19 kg of force, but this should only be used as broad context unless the protocol is closely matched.
• A hip extension handheld dynamometry study found that HHD testing had moderate concurrent validity compared with isokinetic dynamometry for peak hip extension strength in healthy adults. This supports the usefulness of HHD-style testing, but also reinforces that different devices and positions should not be compared as if they are identical.
• The same study reported that single-trial values correlated strongly with the mean of three trials, with correlations around r = 0.92–0.94. This supports the practical value of consistent trials, although best-of-three or average-of-three scoring should still be applied consistently.
• A broad reference-values study of 1,000 healthy participants aged 3–101 years included isometric hip strength testing and showed that age, sex and body size influence strength values. This supports using matched comparison data when possible.
• For side-to-side comparison, a difference of around 10% or more is often worth reviewing more closely, especially if it matches symptoms, previous injury, confidence changes or functional differences. This is not a strict pass/fail cut-off.
• Comparing hip extension with hip flexion can also be useful. Large differences between directions may provide context, especially when paired with symptoms, gait, sprinting, stairs, lifting or work demands.
• If force is recorded as a percentage of body weight in Measurz, use it mainly for the client’s own baseline, side-to-side comparison and retesting. Bodyweight percentage is useful only when calculated from the client’s actual test force and body weight.

These values are best used as comparison data. They can help provide context, but they should not be used as diagnostic, clearance or pass/fail cut-offs.

Practical interpretation priorities

Use this order:

1. Compare with the client’s own baseline.
2. Compare right and left sides when relevant.
3. Compare hip extension and flexion where relevant.
4. Review force relative to body weight where calculated.
5. Consider symptoms during and after testing.
6. Consider confidence and effort quality.
7. Review whether compensations were present.
8. Compare with related strength, mobility or performance tests.
9. Relate the result to walking, running, jumping, lifting, sport, work or daily-life demands.
10. Retest under the same conditions to monitor change.
11. Do not use reference values as pass/fail criteria.

What to look at for each relevant Muscle Meter metric

Peak force
Use for maximum hip extension force output, baseline strength, side-to-side comparison, extension-to-flexion comparison, progress tracking and comparing force across retests. Look for best score or average score, consistent setup, side-to-side difference, change from baseline, pain response and compensation during maximal effort.

Force as percentage of body weight
Use when calculated directly from test force and body weight. It may help compare the client’s result to their own baseline, the opposite side and body size. Do not treat it as a universal target unless the comparison data use a closely matched protocol.

Torque
Use only when the lever arm is measured and a more biomechanical interpretation is needed. It can help when limb length or device placement changes the raw force reading. It should not be used as normative data unless the reference data match the setup closely.

Rate of force development
Use when rapid hip extension force matters, such as sprinting, jumping, acceleration or change of direction. Look for early force production and whether rate of force development changes while peak force stays similar.

Time to peak
Use to understand whether force is produced quickly or gradually. Look for delayed peak force, faster time to peak across retests, and whether a slower time reflects caution, pain, poor cueing or an actual performance difference.

Impulse
Use only if a defined sustained force window is intentionally tested. Look for whether the client can sustain hip extension force briefly and whether impulse improves while peak force stays similar.

Fatigue index
Use only if repeated or sustained hip extension efforts are part of the protocol. Look for drop-off across repeated trials, symptom-related fatigue and whether fatigue improves across a training block.

Assessing and Providing Context for Different Client Populations

Youth clients
Consider growth, maturation, coordination, attention, training age and familiarisation. Practice trials are important because maximal hip extension effort can be difficult to coordinate without trunk or pelvis movement.

Adults and general fitness clients
Use the test for baseline lower-limb strength, progress tracking and confidence with loading. Compare results with hip mobility, trunk control, lower-limb strength and general exercise goals.

Older adults
Consider walking confidence, stair climbing, transfers, rising from a chair, balance, fatigue, rest periods and function. A lower score may provide useful context, but it should not be interpreted without functional assessment.

Athletes and sport clients
Consider sprinting, jumping, acceleration, change of direction, lifting, contact demands and sport-specific hip drive. Peak force alone does not equal sport performance, but it can support a broader lower-limb strength profile.

Workplace and manual task clients
Consider stairs, ladders, lifting, carrying, pushing, pulling, prolonged standing, walking distance and repeated hip extension demands. Do not use one score to clear work duties.

Clients returning after injury
Use the test to monitor force output, confidence and symptom response. Strength alone should not confirm readiness.

Clients with pain or persistent symptoms
Pain, fear, guarding, fatigue, apprehension and confidence may reduce force. Record symptom response carefully and compare with related tests.

Higher body mass clients
Absolute force and force relative to body mass may both be useful. Interpret results in relation to goals, symptoms and functional demands, not assumptions about body size.

Reliability, Validity and Measurement Considerations

Repeatability improves when the same setup is used each time. Record and standardise:

• Same test position
• Same pelvis position
• Same trunk position
• Same hip angle
• Same knee angle
• Same device placement
• Same strap setup, if used
• Same anchor height and distance, if straps are used
• Same strap angle, if straps are used
• Same stabilisation
• Same instructions
• Same contraction duration
• Same rest period
• Same scoring method
• Same symptom and compensation recording

Hip extension strength testing is setup-dependent. Small changes in trunk position, pelvis control, hip angle or device contact point can change the score. For stronger clients, handheld resistance may be limited by professional strength. Strap-stabilised or fixed setups can improve repeatability.

Common Errors and Limitations

Common errors include:

• Lower-back arching
• Pelvis lifting or rotating
• Trunk leaning
• Knee angle changing
• Opposite-leg pushing
• Device placement changing between trials
• Strap or anchor movement
• Breath holding
• Testing through high pain or cramping
• Comparing different protocols directly
• Treating the score as a diagnosis

Limitations include:

• Testing is setup-dependent
• Manual resistance may be limited by professional strength
• Muscle Meter-specific universal norms may be limited
• Published hip extension norms vary by device, position and population
• Pain, fear or guarding can reduce force output
• Peak force does not measure endurance or movement quality
• Strong symmetry does not automatically indicate readiness for sport or work

Practical Applications

The Hip Extension Strength Test may be useful for:

• Baseline hip strength assessment
• Side-to-side comparison
• Monitoring response to exercise or intervention
• Comparing extension with flexion where relevant
• Supporting walking, sprinting, jumping and lifting assessment reasoning
• Comparing with hip mobility, trunk control, hamstring strength and functional tasks
• Sport and workplace strength profiling
• Client education
• Fitness and performance progress tracking

Ideas to Make the Result Better

If force is low on both sides, consider assessing hip range of motion, hip flexion strength, trunk control, hamstring strength, gait, stairs, recent workload and confidence with loading.

If one side is much lower, compare with symptoms, injury history, hip mobility, flexion strength, single-leg tasks, jumping, lifting, running exposure and work or sport demands.

If pain or cramping limits the result, record symptom location and review whether device placement, test position or effort level needs modification.

If force is good but function is limited, compare with gait, stairs, sprinting mechanics, jumping, lifting tolerance, workload and task exposure.

If the client is improving, keep the same test setup and monitor whether force, symptoms, confidence and function improve together.

Recommended Standard Protocol Summary

Position: Prone, prone-standing, standing, supine or bridge-style position, with pelvis and trunk controlled
Start position: Hip and knee position recorded
Joint or trunk angle: Record hip, knee, pelvis and trunk position
Trials: 1–2 practice trials, then 2–3 recorded trials
Contraction duration: 3–5 seconds
Rest: 30–60 seconds between efforts
Metric: Peak force, plus percentage of body weight if directly calculated
Attachment or device setup: Muscle Meter against posterior thigh, with consistent contact point; strap-stabilised if used
Final score: Best trial or average of trials
Key retesting requirement: Same body position, pelvis control, hip angle, device placement, instructions, contraction duration, rest and scoring method

FAQs

What does the Hip Extension Strength Test measure?

It measures isometric hip extension force output in a specific test setup.

Which muscles contribute to hip extension?

The main contributors include gluteus maximus, hamstrings and adductor magnus, with trunk and pelvis control also influencing the test.

Should the result be recorded as percentage of body weight?

It can be if you calculate it directly from test force and body weight. This is useful for internal comparison, especially when tracking change over time.

Are there universal hip extension norms for the Muscle Meter?

Published universal Muscle Meter norms for this exact protocol appear limited. Baseline, side-to-side comparison and repeated testing are usually more useful.

What numerical values are available for comparison?

Published handheld dynamometry data in young women reported hip extension force around 27.04% body weight. This is useful context but not a direct Muscle Meter target unless the setup is closely matched.

Can this test diagnose gluteal weakness or a hamstring injury?

No. It can measure force output and symptom response, but it does not diagnose a condition or explain symptoms on its own.

What can make the result unreliable?

Lower-back arching, pelvis rotation, different hip angles, device slipping, pain, fatigue and inconsistent instructions can affect results.

What should be recorded in Measurz?

Record side, body position, hip angle, knee angle, device placement, peak force, percentage bodyweight if calculated, symptoms, compensations, confidence, scoring method and related findings.

Key Takeaways

• The Hip Extension Strength Test measures isometric hip extension force output.
• Peak force is usually the main routine Muscle Meter metric.
• Published comparison data include hip extension force around 27.04% body weight in young women, but protocols vary.
• Percentage of body weight should only be used when calculated directly from force and body weight or when comparison data are reported that way.
• Baseline comparison, side-to-side comparison and retesting consistency are usually more useful than broad norms.
• Reference values provide context, not diagnostic or clearance cut-offs.
• Measurz should capture setup, symptoms, bodyweight-normalised values where calculated, compensations and retesting conditions.

References

Daloia, L. M. T., Leonardi-Figueiredo, M. M., Martinez, E. Z., & Mattiello, S. M. (2018). Isometric muscle force assessment of the hip muscles in healthy women: A reliability and normative data study. Journal of Bodywork and Movement Therapies, 22(2), 420–427.

Koblbauer, I. F. H., Lambrecht, Y., van der Hulst, M. L. M., Neeter, C., Engelbert, R. H. H., Poolman, R. W., Scholtes, V. A. B., & Takken, T. (2011). Reliability of maximal isometric knee strength testing with modified hand-held dynamometry in patients awaiting total knee arthroplasty: Useful in research and individual patient settings? BMC Musculoskeletal Disorders, 12, 249. https://doi.org/10.1186/1471-2474-12-249

McKay, M. J., Baldwin, J. N., Ferreira, P., Simic, M., Vanicek, N., Burns, J., & 1000 Norms Project Consortium. (2017). Normative reference values for strength and flexibility of 1,000 children and adults. Neurology, 88(1), 36–43. https://doi.org/10.1212/WNL.0000000000003466

Mentiplay, B. F., Perraton, L. G., Bower, K. J., Adair, B., Pua, Y. H., Williams, G. P., McGaw, R., & Clark, R. A. (2016). Validity of the handheld dynamometer compared with an isokinetic dynamometer in measuring peak hip extension strength. Physiotherapy Theory and Practice, 32(7), 530–538. https://doi.org/10.1080/09593985.2016.1203024

World Physiotherapy. (2019). Normative values for isometric hip muscle force assessed by hand-held dynamometry. World Physiotherapy Congress Proceedings.