Yes. Handheld myotonometry has been used in paediatric populations, including children with cerebral palsy and other developmental disabilities, with reported intra-rater and inter-rater reliability. The catch is not the measurement. It is that paediatric reference values barely exist, so each child has to be compared to themselves.
What does the paediatric evidence actually cover?
Mostly children with neurological and developmental conditions. That is where the clinical need for an objective tone measure has been sharpest.
A 2023 study in Healthcare analysing myotonometer reliability in children with developmental disabilities examined intra-rater and inter-rater agreement for muscle tone evaluation and supported the device as an objective addition to clinical assessment. The authors made a point worth carrying over: standard clinical scales blend several tissue properties into one grade, so they may not separate stiffness from other components of tone.
An earlier preliminary study in Applied Sciences measuring muscle stiffness in children with cerebral palsy used myotonometry in twelve children with a mean age of eight years and reported a significant correlation between the device readings and the Ashworth Scale. Small sample, narrow population, but it establishes feasibility in exactly the patients who are hardest to assess by hand.
Why can't you use adult reference values?
Because the normative work was built on adults. Borrowing those ranges would import an error you cannot size.
A 2026 pilot study in the Journal of Manual and Manipulative Therapy establishing reference values for muscle stiffness and asymmetry drew on healthy young adults and found that stiffness was higher in males, while age, body mass index and weekly exercise did not shift results much within that sample. Useful for adult practice. Not transferable to a growing child, whose tissue properties are still changing.
The practical consequence is simple. In children, a reading is a baseline, not a verdict. What carries information is the difference between this visit and the last one at the same site.
What changes in a paediatric protocol?
Positioning discipline matters more, and so does speed. A child will give you a shorter window of stillness than an adult will.
| Protocol element | Adult practice | Paediatric adjustment |
|---|---|---|
| Reference values | Adult normative ranges available | Use the child as their own control |
| Positioning | Standard supported position | Support the limb fully, photograph the setup for repeatability |
| Muscle state | Relaxed, verified verbally | Relaxed, verified by observation, since self-report is limited |
| Number of sites | Several per session | Fewer sites, repeated the same way every visit |
| Interpretation | Compare to baseline and to reference range | Compare to baseline only |
None of this is exotic. It is the same rule that governs adult measurement, applied more strictly because you have less normative data to fall back on.
What can a stiffness reading not tell you about a child?
It cannot name a cause. A reading may reflect a change in tissue mechanics. It does not confirm a diagnosis, and it does not predict what will happen next.
A 2024 systematic review in Medicina on myotonometer reliability is clear that reliable is not the same as diagnostic. The device repeats well. Interpreting what a number means clinically still depends on history, examination and validated scales. In paediatric care, where the differential is wide and the child may not describe symptoms precisely, that boundary matters more than usual.
Survey data: In a 2026 survey of 455 patients who stopped chiropractic care, 58% cited perception-based reasons: 36% felt no progress, and 22% felt better and stopped. Neither group was shown that their soft tissue stiffness was still elevated.
Why measure at all if you cannot compare to a norm?
Because the parent is the one deciding whether therapy continues. With a child, perception-based dropout sits one seat over.
A parent watching six weeks of therapy without visible change is making the same judgment adult patients make about themselves. A short series of readings at the same site gives them something concrete to look at, and it gives you a record of whether the plan is doing anything measurable. That is worth having even when the only valid comparison is the child's own first visit.
Frequently Asked Questions
Can you measure muscle stiffness in children?
Yes. Handheld myotonometry has been applied in paediatric populations, including children with cerebral palsy and other developmental disabilities, with reported intra-rater and inter-rater reliability. The main limitation is the shortage of paediatric reference values.
Is the measurement uncomfortable for a child?
It is a brief, light tap on the skin over the muscle, not a compression or a needle. Most protocols take several readings per site in a few seconds, which is why the method has been feasible in young children.
Can you compare a child's reading to adult reference values?
No. Published reference ranges come from healthy adult samples and were collected with adult-specific protocols. A child's reading should be compared to that same child's earlier readings at the same site.
Does a stiffness reading tell you the same thing as a spasticity scale?
No, though the two may move together. A preliminary study in children with cerebral palsy reported a significant correlation between myotonometric stiffness and the Ashworth Scale, but a mechanical reading and a clinician-graded resistance scale remain separate measures.
How do you keep readings consistent when a child will not stay still?
Fix the position, the limb support and the marked site before you start, and repeat that setup exactly at the next visit. Movement and muscle activation both change the reading, so a relaxed and repeatable position matters more than the number of sites.
Can stiffness measurement diagnose a condition in a child?
No. A stiffness reading may reflect a change in tissue mechanics, but it does not identify a cause or confirm a diagnosis. It belongs alongside history, examination and standard clinical scales, not in place of them.
Does age affect what counts as a normal reading?
Almost certainly, since tissue properties change through growth. Paediatric normative work is still thin, which is the practical reason to treat each child as their own baseline rather than benchmarking against a published range.
One approach is to add a second channel of objective data alongside subjective pain reports. Options include soft tissue stiffness measurement (such as MuscleMap), range-of-motion testing, and posture analysis. Each gives you something concrete to show the patient rather than asking them to take your word for it.