The impacts of transcranial direct current stimulation combined with aquatic neuromuscular training on pain, function, kinesiophobia, knee instability, and quality of life in knee osteoarthritis: a double-blind randomized trial.
Asma Tapeh Kaboodi, Farzaneh Gandomi, Parviz Soufivand and 1 others
PMID 40618157WHAT IT FOUND
Adding brain stimulation to water exercises didn't reduce pain more than placebo at six weeks, but it improved knee stability and function.
Both groups got better, so the stimulation didn't add a pain benefit over the exercise alone.
Key findings
01There was no significant difference in pain reduction between the real and placebo stimulation groups after six weeks.
02Real stimulation combined with aquatic training significantly improved knee instability and physical function compared to placebo.
03No significant differences were found between groups for fear of movement or quality of life after adjusting for baseline scores.
STILL TO COME
How it was doneWhat they foundWhat it means for PTsWhat it means for OTs
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What it does not show
The study had no long-term follow-up, so it is unknown if the benefits of tDCS on stability and function persist. The sample size was small and included only women, limiting generalisability to men or broader populations. Participants' home activities, sleep, and diet were not controlled, which could have influenced outcomes. Baseline differences in kinesiophobia and quality of life between groups required statistical adjustment, which may affect the clarity of those results.
The easy way to misread this
Do not conclude that tDCS is ineffective for pain. The study showed that pain decreased significantly in both groups, but the addition of tDCS did not provide a statistically significant advantage over placebo for pain relief at the six-week mark.