Deep neck flexor endurance test: Procedure and normative values

Key takeaways

The deep neck flexor endurance test measures how long the longus colli and longus capitis can hold the head off the table.

Healthy adults average 38.9 seconds for men and 29.4 seconds for women, so a shorter hold points to a motor control deficit.

You run it supine, with the chin tucked and the head lifted about an inch, timed until fatigue or form breakdown.

Reading the flexor hold time against the extensor hold time tells you which side of the neck needs the training.

Practice management software like Pabau files each hold time in the patient record and schedules the four-week retest for you.

Neck pain affects over 25% of the population each year, and many of those cases involve poor deep cervical muscle control. The deep neck flexor endurance test finds that deficit in under a minute, using nothing but a table and a stopwatch.

This guide covers the procedure, the values you compare against, and how to score and document the result. It also shows you how to read the flexor hold time against the extensor hold time, which is where the training decision gets made.

What the deep neck flexor endurance test measures

The test measures how long the longus colli and longus capitis can hold an isometric contraction against gravity. These deep cervical flexors are stabilizers. Unlike the superficial sternocleidomastoid, they give you the fine neuromuscular control that keeps the cervical spine aligned during ordinary tasks.

A short hold time tells you the patient lacks the motor control to protect the cervical spine during everyday activity. Reduced times track with neck pain, whiplash history, and headache. Good physical therapy software makes recording baseline and follow-up times a two-second job.

The muscles you are testing

Two muscles do the work:

• Longus colli: The largest deep cervical flexor, running along the anterolateral cervical spine. It controls nodding and fine cervical rotation.
• Longus capitis: A smaller flexor that works with the longus colli to start cervical flexion and steady the upper cervical spine.

Together they produce cranio-cervical flexion, a small controlled chin tuck that loads the deep stabilizers instead of the superficial ones. Weak deep cervical flexors predict poor cervical motor control and a higher injury risk. The cranio-cervical flexion test is the graded version of the same movement.

Equipment and patient positioning

You need no specialized equipment. A treatment table or firm surface, a stopwatch, and the downloadable form cover it.

• Patient position: Supine, knees bent, feet flat on the table or the floor, whichever is more comfortable.
• Head position: Neutral alignment, with the cervical spine neither flexed nor extended before you start.
• Starting posture: The head rests on the table and the chin is tucked slightly to engage the deep flexors.
• Therapist position: Stand or sit at the patient’s head so you can watch form, cue, and time the hold.

Positioning decides whether the result means anything. A hyperextended neck or tense shoulders let the sternocleidomastoid take over, and the number you record stops reflecting the deep flexors. Spend 30 seconds getting it right. A full head and neck assessment gives you the surrounding findings this one number cannot.

How to run the test, step by step

Follow the same five steps every time, so your results stay comparable.

1. Set the chin tuck. Ask the patient to tuck the chin gently, as if making a double chin. They should feel a light contraction at the front of the neck, not pain. Cue relaxed shoulders and very little neck flexion, since the movement happens mainly at the cranio-cervical joint.
2. Lift the head. Once the tuck is stable, ask for a lift of about an inch, or 2.5 cm. The head should come up as a unit with the tuck held. Do not let it drift into extension.
3. Start the timer. Begin timing the moment the back of the head leaves the table. Keep cueing throughout: hold it there, chin tucked, shoulders relaxed.
4. Watch form and fatigue. Look for head tilt, a chin poking forward, shoulder elevation, or neck extension. Cue the tuck once if form slips. The test ends when the patient cannot hold the position despite cueing.
5. Record the hold time. Stop the timer when the head touches down or the chin tuck is lost. Write the time in seconds on the form or in your digital forms, and note any compensations.

Normative values and reference data

Normative hold times let you place a patient’s result in context. The most widely cited reference values come from Domenech et al. (2011), who timed healthy adults across a broad age range.

Patients with chronic neck pain hold for roughly half as long as healthy controls. That separation is what makes the test useful for spotting a motor control deficit and for tracking rehabilitation. Domenech’s sample ran from age 20 to 80, and age made little difference to hold time, while sex clearly did.

Record the patient’s sex alongside the hold time, or the comparison you make later will be against the wrong number. The normative data study reports means with wide standard deviations, so treat a single result as one data point rather than a verdict.

Scoring and clinical interpretation

Scoring is simple. You record the hold time in seconds, then read it against the patient’s sex and presenting complaint.

• At or above the reference mean: Normal deep cervical flexor endurance, with no motor control deficit evident.
• Within a few seconds of the mean: Normal function. If symptoms persist, look at the extensors and rotators.
• 20% to 30% below the mean: A mild deficit. Plan graded cranio-cervical flexion training.
• More than 50% below the mean: A significant deficit, common with chronic neck pain, forward head posture, or whiplash. Make stabilization training the priority.

Use the form to record the hold time, the patient’s age and sex, any compensations, and your impression. Digital forms in practice management software like Pabau flag a result that falls outside the expected range. That leaves you writing the interpretation rather than calculating it.

Reliability and validity

The test is reliable enough to trust across repeat visits and across clinicians. APTA’s test measures database lists intraclass correlation coefficients between 0.84 and 0.95. In practice, a second therapist retesting the same patient should land close to your number.

Validity rests on the link between short hold times and cervical pain disability, poor postural control, and injury risk. Hold times also improve when you train the muscles, which is what makes the test worth repeating.

Which patients to test

Reach for the test whenever the cervical spine is part of the picture. It fits physical therapy caseloads, chiropractic practices, and sports medicine equally well. These presentations come up most often:

• Neck pain: Baseline assessment and progress tracking, in acute and chronic cases alike.
• Cervicogenic headache: Cervical motor control deficits feed headache, so the result points your intervention somewhere specific. Pair it with a headache disability index score.
• Whiplash and post-traumatic: Deep cervical flexor weakness is common after whiplash. A hold time gives you an objective baseline to sit alongside a diagnosis such as S14.119S.
• Postural dysfunction: Forward head posture and desk work often shorten hold times, and the test puts a number on the deficit.
• Dizziness of cervical origin: Run the cervical torsion test too, since motor control and dizziness often travel together.
• Post-surgical cervical: The result helps you judge readiness to move from immobilization to active stabilization work.

The test doubles as an outcome measure. After four to six weeks of targeted training, most patients gain 5 to 15 seconds. Showing them that number does more for patient compliance than another reminder call.

Reading the flexor result against the extensor test

Cervical stability needs balanced endurance front and back. The flexor test covers the anterior stabilizers. The cervical extensor endurance test covers the posterior muscles, the semispinalis capitis and multifidus. Run both and you get the balance, not just one side of it.

The extensor test. The patient lies prone with the forehead on a small towel roll. They lift the head and hold a neutral cervical position for as long as they can. Healthy adults usually manage 40 to 60 seconds, roughly 10 to 20 seconds longer than the flexor hold.

The ratio is where the interpretation gets interesting. A flexor hold of 20 seconds against an extensor hold of 50 seconds points to dominant extensors and weak flexors.

That is the classic forward head posture and upper cross pattern, and it tells you to train the front. Weak extensors with a normal flexor time is the mirror image, and the program flips.

Retest both at the same interval so the ratio stays meaningful. A broader range of motion assessment at the same visit tells you whether stiffness is limiting the hold. Where a directional preference shows up, McKenzie method exercises sit alongside the endurance work.

How to use the downloadable form

The form is built to be filled in at the table, not typed up afterwards.

1. Fill in the demographics. Name, date of birth, date of test, and the presenting complaint.
2. Record the baseline. Enter the hold time in seconds and note any compensations, such as head drift, chin poke, or shoulder elevation.
3. Compare to the reference values. The form carries the normative table, so mark where the result sits for the patient’s sex.
4. Write the impression. Normal, mildly low, or significantly low, and whether that matches what the patient reports.
5. Plan and set the retest. Prescribe graded cranio-cervical flexion work three times a week, then book the retest four weeks out.
6. Keep the history. File the baseline and every follow-up together, so improving hold times can guide the next progression.

Attach the completed form to the same record as your physical therapy intake form and it stays findable at the next visit.

One caveat on retesting. Run it at the same time of day and under similar fatigue. A patient tested at 6PM after a shift will look worse than the same patient tested at 9AM.

How Pabau keeps hold times and retests on track

Recorded on paper, a hold time is hard to use. It sits in a folder, the four-week retest depends on someone remembering, and the comparison often never happens.

Pabau, an all-in-one practice management system, keeps the measurement and the follow-up together. You capture the hold time on a digital form at the table. It files straight into the patient record, next to your notes and photos. Automated workflows then create the retest reminder without anyone adding it to a list.

Over a course of treatment that gives you a clean line of hold times to show the patient. Whether you run a physical therapy caseload or a chiropractic practice, the same record carries the assessment, the plan, and the proof it worked.

Every Pabau subscription includes the forms, the records, and the automations, so none of this sits behind a higher tier.

Track cervical endurance without the paper trail

Pabau records each hold time on a digital form, files it in the patient record, and schedules the four-week retest automatically. You get a clean progress trail to show the patient.

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Conclusion

What makes this test worth the 30 seconds is repeatability. You get a number you can defend, repeat, and put in front of the patient four weeks later.

The trade-off worth remembering is that a single hold time says less than you would like. The standard deviations are wide, form breaks down for reasons unrelated to endurance, and a tired patient tests low. Treat the first result as a starting point and the second as the finding.

So download the form, test both flexors and extensors at the first visit, and book the retest before the patient leaves. Book a demo to see how Pabau keeps every hold time and retest in the patient record for you.

Continue your research

Need another cervical provocation test? Halstead maneuver sets out the positioning and what a positive result suggests.

Assessing the shoulder in the same session? Lift-off test covers how to grade subscapularis strength and record the finding.

Is the patient dizzy when they turn their head? Cervicogenic dizziness exercises gives you a handout to send home after the assessment.

Treating desk workers with forward head posture? Seated exercises offers low-barrier options patients can do between visits.

Writing the assessment up as a SOAP note? SOAP notes template shows where a timed test result belongs in the objective section.

Frequently asked questions