Pain, Proprioception and Balance: Why Neck Rehabilitation Needs More Than One Outcome Measure

The short answer

Neck rehabilitation does not produce one universal response. A recent four-arm randomised trial found that dedicated balance training produced the largest change in static balance, while specific deep cervical extensor training produced stronger changes in pain and muscle size. Cervical joint-position sense improved statistically across several exercise groups, but the changes did not exceed the study’s cited threshold for detectable clinical change.

For clinicians, the practical lesson is straightforward: decide which domain matters, train it deliberately and measure it directly. A pain score cannot stand in for proprioception. A range-of-motion value cannot stand in for balance. And an improvement in one domain should not be assumed to prove change in another.

What did the study investigate?

Leungbootnak and colleagues recruited 132 adults aged 20–69 with mild-to-moderate chronic subclinical neck pain. Participants were randomly allocated to one of four programmes:

• specific deep cervical extensor training;
• cervical proprioceptive training;
• progressive balance training; or
• an active control programme containing pain-free cervical movement, stretching and strengthening.

The three targeted programmes and the active control were supervised twice a week for six weeks. Outcomes were measured at baseline, immediately after the intervention and again one month later. The assessor and statistician were blinded to group allocation.

This design is useful because it compares several plausible rehabilitation targets within the same trial. It also avoids reducing “improvement” to a single score. The researchers assessed static and dynamic balance, pain, disability, deep cervical muscle cross-sectional area and cervical joint-position sense.

Different programmes changed different outcomes

The clearest result concerned static balance. The dedicated balance-training group improved more than the specific extensor group on the Thai Balance Error Scoring System. It was also the only group whose improvement exceeded the 9.4-point minimal detectable change cited by the researchers. That distinction matters: a statistically significant result is not automatically large enough to separate real change from measurement variability.

Specific deep cervical extensor training showed a different pattern. It produced greater short-term pain reduction than the other groups, a larger increase in deep cervical muscle cross-sectional area and a better immediate disability score than balance training. In other words, the programme that performed best for static balance was not the programme that showed the strongest change in every other outcome.

Cervical joint-position sense improved statistically in the extensor, proprioceptive and balance groups. However, the authors noted that these changes did not exceed their cited five-degree minimal detectable change. The extensor group was better than the active control only for the extension direction immediately after treatment. This is a valuable restraint on interpretation: the data suggest change, but do not confirm a clinically detectable improvement across every direction.

Dynamic balance, measured with the Timed Up and Go test, improved within the extensor and balance groups, but there was no significant difference between groups. The authors also noted that a neck-pain-specific minimal important change for this test has not been established, leaving the clinical meaning uncertain.

Why outcome specificity matters in clinic

The trial supports a simple but often neglected principle: assessment and rehabilitation should be linked to the task that matters.

If the clinical goal is better static or dynamic balance, include a balance measure and progressively challenging balance tasks. If the goal is improved head-repositioning accuracy, measure cervical joint-position sense and use exercises that deliberately challenge relocation, movement sense and visual dependence. If the goal is reduced pain or disability, record those outcomes separately rather than assuming that a movement measure tells the same story.

This approach becomes especially important when symptoms overlap. A person can report less pain while still showing an inconsistent return to neutral. Another may improve repositioning accuracy without a meaningful change in balance. A third may perform well in a seated test but struggle when head movement is added to walking or a narrowed base of support.

One measure cannot resolve all of those questions.

A practical multidomain framework

For a clinician-led neck rehabilitation pathway, the study suggests four useful steps.

1. Define the impairment before choosing the outcome

Be explicit about whether the working target is pain, disability, active range of motion, joint-position sense, gaze control, static balance or dynamic task performance. Several may matter, but they should not be collapsed into one label such as “neck function”.

2. Match training to the intended adaptation

The balance programme progressed stance and walking tasks, then added eye and head movements. The proprioceptive programme progressed head relocation, laser-guided tracing and eye-head coordination. This specificity helps explain why the largest changes were not identical across groups.

3. Repeat the same measurement under comparable conditions

Reliable follow-up depends on consistent setup, instructions, movement direction and test conditions. For joint-position-sense testing, changes should be interpreted against measurement error rather than judged only by whether the number moved in the desired direction.

4. Progress from isolated control to functional demand

A seated repositioning task can reveal one part of cervical sensorimotor performance. It does not replace balance, gait or dual-task testing when those demands are clinically relevant. Progression should make the task more representative without losing enough standardisation to make comparison meaningless.

Where HeadX may fit — and where this study does not

This trial did not test HeadX Kross or HeadX Duo, so it cannot be used as evidence that either product improves pain, balance or disability.

Its relevance to HeadX is narrower and more useful: it demonstrates why clinicians need to choose and repeat domain-specific measures. The proprioceptive programme used a forehead-mounted laser for head relocation and movement-sense exercises, while joint-position outcomes were assessed separately with a CROM device.

Where clinically appropriate, HeadX Kross can provide visible crosshair feedback for clinician-selected relocation and movement-control tasks. HeadX Duo adds digital capture for cervical range-of-motion and joint-position-sense assessments. Neither replaces balance testing, pain and disability measures, or clinical reasoning.

Clinicians can also explore HeadX’s cervical joint-position error guide and structured exercise library when designing a graded, task-specific programme.

Important limitations

The participants had mild-to-moderate subclinical neck pain. People with whiplash, vestibular disorders, neurological conditions and other factors affecting balance were excluded, so the findings should not be transferred directly to those populations. The intervention lasted six weeks and follow-up was limited to one month. The sample was mainly young and middle-aged, and muscle activation was not measured with EMG.

The paper therefore informs clinical reasoning; it does not establish a universal protocol or prove long-term effectiveness.

The bottom line

The most useful result is not a winner-takes-all exercise recommendation. It is the separation of outcomes. Balance training, deep cervical extensor work and proprioceptive training produced different patterns of change.

For practice, that means measuring the outcome you intend to change, interpreting it against measurement error and progressing the task toward the patient’s real functional demand. Better neck rehabilitation is not just more exercise. It is clearer targeting, repeatable measurement and evidence-aware progression.

Reference

Leungbootnak A, Puntumetakul R, Chatprem T, Hunsawong T, Wanpen S, Sae-Jung S, Boucaut R. Effects of specific extensor exercise on balance control in patients with neck pain: a randomized controlled trial. BMC Complementary Medicine and Therapies. 2026;26:183. https://doi.org/10.1186/s12906-026-05366-7