Hip range of motion test

Key takeaways

Hip range of motion testing measures six movement planes with a goniometer: flexion, extension, abduction, adduction, internal rotation, and external rotation.

Normal values are flexion 0-120°, extension 0-30°, abduction 0-45°, adduction 0-30°, and 0-45° for both internal and external rotation.

Active range of motion sits 5-10° below passive range. A larger difference points to weakness or pain inhibition rather than stiffness.

Manual goniometry overstates true hip motion, so compare a patient against their own baseline rather than against another clinician’s readings.

Practice management software like Pabau records bilateral degrees, end feel, and notes in the chart, so every follow-up starts from the last measurement.

A hip range of motion test measures how far the hip moves in six directions, recorded in degrees using a goniometer. Normal figures run from 0-120° in flexion to 0-30° in adduction. Both hips are always measured, because the difference between sides often matters more than either number on its own.

This guide covers the testing procedure for active and passive motion, goniometer placement, the normal reference values, and how to read your findings. It also explains what manual goniometry can and cannot tell you, which decides how much a 5° change is worth.

The free form above gives you somewhere to record it all, and a physical therapy EMR keeps the results in the patient’s chart.

What is a hip range of motion test?

A hip range of motion test measures the angular movement available at the hip joint across six planes. Three things get recorded at each plane:

• Active range of motion (AROM). The patient moves their own hip through the plane. This shows functional movement capacity and neuromotor control.
• Passive range of motion (PROM). You move the hip for them, with no muscular effort from the patient. This shows the structural mobility available.
• End feel. The quality of resistance at the end of the range, described as firm, hard, soft, or springy. It tells you which tissue is stopping the movement.

Standard goniometry is the reference method for all three. A 12-inch goniometer sits with its axis at the center of the hip joint, one arm along the pelvis and the other along the femur. The angle between the two arms, in degrees, is the recorded measurement.

Normal hip ROM values by movement plane

Reference values come from the standardized testing protocols published by the American Academy of Orthopaedic Surgeons (AAOS) and repeated across the clinical literature. The table below sets out the accepted ranges for all six planes.

Measure against these and the restricted planes show up immediately, along with how far off they are. That is usually enough to point your clinical reasoning at a tissue or a structure.

How to assess active range of motion (AROM)

AROM shows what the patient can produce under their own muscular control. Five steps keep the measurement repeatable:

1. Position the patient. Supine on the treatment table, hips and knees relaxed. A slightly flexed knee reduces hamstring tension, and the pelvis stays flat on the table.
2. Give the instruction. Demonstrate the direction first, then cue it plainly: “move your hip toward your chest” for flexion, “slide your leg out to the side” for abduction.
3. Place the goniometer. Axis at the hip joint center, using the anterior superior iliac spine as your landmark. One arm along the pelvis midline, the other along the femur midline.
4. Measure and record. Read the angle at the end of voluntary movement. Record left and right separately and note any asymmetry.
5. Document the end feel. Note whether the movement stopped because of pain, weakness, stiffness, or the end of available range.

AROM usually runs 5-10° below PROM, because it depends on force production. A difference wider than 10° points to muscle weakness or pain inhibition holding back voluntary movement.

How to assess passive range of motion (PROM)

PROM shows structural mobility independent of the patient’s strength. It is what separates contractile tissue, meaning muscle, from inert tissue such as capsule and ligament.

1. Set the patient up. Supine and completely relaxed. Stabilize the pelvis with one hand so it cannot compensate for the hip.
2. Move the limb yourself. Take the hip through each plane with slow, steady pressure. Stop at the first resistance, not at the point of discomfort.
3. Assess the end feel. Firm means capsular stretch, soft means soft tissue approximation, hard means a bone-to-bone block, springy means muscle spasm.
4. Measure with the goniometer. Record the passive angle for each plane, both sides.
5. Note the pattern. One restricted direction alongside normal planes suggests directional capsular tightness or a bony block.

PROM that barely exceeds AROM usually means muscle tightness. PROM well above AROM points the other way, toward weakness or inhibition limiting what the patient can do voluntarily.

Measuring internal and external rotation

Rotation is the plane that goes first in hip dysfunction, so it deserves a careful setup. Test it prone, with the knee flexed to 90°, which isolates the hip and stops the lumbar spine from helping.

• Position: Prone, knee flexed to 90°, hip neutral in flexion and extension.
• Movement: For internal rotation the lower leg swings away from the midline. For external rotation it swings toward it.
• Goniometer: Axis at the femoral epicondyles, one arm held vertical as the reference, the other along the tibia.
• Recording: Measure both sides. Normal is 0-45° each way, so flag any side that falls well short.

A 10-15° difference between sides turns up often in athletes and other active patients. Sports medicine practices see it in runners and field athletes long before it becomes painful.

Recording both rotation values at every visit is what lets you show the correction later. Practice management software keeps that series in one place instead of spread across four paper sheets.

Goniometry technique and its margin of error

Accurate goniometry comes down to tool choice and consistent landmarks. Use a 12-inch instrument for the hip, since shorter arms wobble against the length of the femur.

• Axis placement: The fulcrum aligns with the hip’s axis of rotation. Palpate the anterior superior iliac spine (ASIS) as your anterior reference.
• Arm alignment: The stationary arm runs along the pelvis midline, from ASIS to pubic symphysis. The moving arm runs along the femur midline.
• Stabilization: Hold the stationary arm firmly against the pelvis so it cannot tilt as the leg moves.
• Reading: Take the scale reading at the endpoint of motion and record it to the nearest degree.
• Repeats: Measure twice per side and average the two readings.

It is worth knowing what those degrees represent. A manual goniometer reads the angle between two body segments, not the angle inside the joint itself. It therefore overstates true hip motion, and the size of that error changes with the plane you are testing.

One reliability study in patients with hip impingement found strong agreement for abduction and internal rotation. Adduction was the weakest plane of the six. Repeat readings by the same examiner held up well across all of them.

Two practical consequences follow. Compare a patient against their own earlier readings rather than a colleague’s, and keep the same examiner where the schedule allows. Treat a 3-5° shift between visits as noise, and look for 10° or more before you call it progress.

Consistency is easier to hold when the recording sheet asks for the same fields every time. Digital assessment forms prompt for both sides, for AROM and PROM, and for an end feel on each plane.

Bilateral recording and clinical documentation

Test and record both hips every time. An asymmetry is a finding in its own right, and it often shapes the treatment plan more than the absolute numbers do.

• Record degrees for each movement plane, each side, separately.
• Note the difference between sides. Right flexion of 120° against left flexion of 100° is a 20° unilateral restriction.
• Log the end feel for every movement, whether firm, soft, hard, springy, or pain-limited.
• Keep pain-limited range, such as “pain at 90° flexion”, separate from true structural limitation.
• Compare every reading against the baseline or the last assessment so progress is visible.

That level of detail only helps if you can find it again months later. Client record systems hold ROM data in the patient’s permanent file and pull up prior assessments at the follow-up visit.

What restricted findings tell you

ROM values point your reasoning at a structure. These are the patterns that come up most often:

• Flexion restriction at, say, 90° instead of 120° suggests hip flexor tightness or anterior capsule involvement. It is common in desk workers and in hip osteoarthritis.
• Internal rotation loss is often the first sign of intra-articular hip pathology, so it deserves attention even when the other planes look normal.
• Asymmetrical patterns point to unilateral pathology, whether labral involvement, muscle guarding, or compensation after an injury.
• Pain-limited range at end-range suggests active inflammation. A true structural limit tends to be pain-free even at maximum range.
• End feel separates the tissues. Soft means muscle shortness, firm means capsular tightness, and hard can mean a bony block such as impingement.

When the findings line up with what the patient complains about, you have an outcome measure you can retest. Automated workflows can prompt the reassessment at set intervals, which catches a plateau early.

Reliable baselines depend on the same form being used every time. Going paperless removes the variation that comes with handwriting, loose sheets, and forms that differ between clinicians.

How Pabau keeps ROM measurements in the patient record

Paper is still the usual route. Degrees get written on a sheet at the table, then summarized into the notes that evening. Six weeks later, nobody can say whether flexion started at 95° or 105°.

Practice management software like Pabau replaces the sheet with a form on the screen in front of you. You build the hip ROM assessment once, with bilateral fields for each plane and an end feel selector beside them. It opens straight from the patient’s chart, already carrying their name, the date, and yours.

In practice the workflow runs like this:

1. Open the form. From the patient’s chart, pick the hip ROM assessment out of the form library.
2. Enter the degrees. Record AROM and PROM for all six planes, left and right, while the patient is still positioned.
3. Select the end feel. Each plane has its own selector for firm, soft, hard, or springy, so none of the six gets skipped.
4. Add your interpretation. Note pain-limited ranges, asymmetries, and anything that changes the treatment plan.
5. Save it. The assessment is filed in the chart. At the next visit you open it beside the new one and compare without retyping anything.

Progress tracking then charts the same plane across visits, so a plateau shows up while there is still time to change the plan. The practical result is fewer repeat measurements and no transcription errors between sheet and chart. You also get an objective record you can hand to a payer or a referring physician.

Record hip ROM straight into the patient chart

Pabau's digital assessment forms capture bilateral degrees and end feel at the treatment table, then store them in the patient record. Every follow-up opens with the previous measurement already on screen.

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Conclusion

Hip ROM testing earns its place because it turns a vague complaint into a number you can retest. The technique itself is not hard. Holding it steady between visits, and between clinicians, is what decides whether the number means anything.

So set the protocol once, use the same form every time, and record both sides at every visit. Do that and a 15° improvement counts as evidence rather than an impression. Book a demo to see how Pabau stores hip ROM measurements and surfaces the last reading at the follow-up.

Continue your research

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Frequently asked questions