The influence of education on pain during and following acute exercise in people with knee osteoarthritis: A randomised controlled trial.

Exercise can temporarily reduce pain through a phenomenon called exercise-induced hypoalgesia, and some research in pain-free people suggests that simply teaching people about this effect beforehand can boost the pain relief they get from exercising. This trial asked whether the same idea holds for people living with knee osteoarthritis, a chronic pain condition where exercise responses may work differently. Forty participants were randomised online to receive either detailed education about exercise-induced hypoalgesia or general education about knee osteoarthritis, then completed a home-based leg resistance exercise session while pain was tracked. Pain did drop compared to before exercise, both during and afterward, but this improvement was similar regardless of which education participants received.

In other words, exercise itself seemed to ease pain, but the specific pain-science education added on top made no clear difference. The main limitation is the small sample size, which limits confidence in ruling out a true difference between the education approaches, and the online, short single-session format may not reflect real-world physiotherapy practice with repeated sessions over time.

If you have knee osteoarthritis, you may wonder whether exercise will make your pain worse or actually help. This study looked at whether learning about how exercise can reduce pain beforehand changes how much relief you actually feel during and after exercising. Forty people with knee osteoarthritis took part.

Half were taught specifically about how exercise can lower pain, while the other half received general information about knee osteoarthritis. Everyone then did a home exercise routine for their legs.

Pain levels dropped for both groups during and after exercising, but the group that got the specific pain-science education did not experience noticeably less pain than the other group. This suggests that doing the exercise itself was linked to feeling less pain, but the particular education did not add an extra benefit in this study.

Because this was a small study with only one exercise session done at home and tracked online, it cannot tell us how education or exercise might work over repeated sessions or in different settings, so these findings should be seen as preliminary.

This is a summary of research, not medical advice. Talk to your own healthcare provider about anything affecting your care.

This trial addresses a specific clinical question: does explicitly teaching patients with knee osteoarthritis about exercise-induced hypoalgesia enhance the pain-relieving effect of a single resistance exercise session, as has been shown in pain-free populations? Forty participants were randomised online to receive either 15 minutes of explicit exercise-induced hypoalgesia education or 15 minutes of general knee osteoarthritis education before completing a home-based lower limb resistance exercise bout, with pain rated before, during, and immediately after exercise. The decisive finding is that pain intensity fell significantly from baseline during exercise (mean difference -1.01, 95% CI -1.66 to -0.36, p=0.003) and after exercise (-0.96, 95% CI -1.5 to -0.42, p<0.001), but there was no statistically significant between-group difference during (adjusted mean difference 0.51, 95% CI -0.72 to 1.74) or following exercise (-0.75, 95% CI -1.62 to 1.11, p=0.087). Beliefs about exercise and pain also did not differ significantly between groups.

This contributes evidence that within-session hypoalgesia occurs in this population regardless of added pain-science framing, but the small sample and single online session limit confidence in excluding a true educational effect and do not establish whether findings generalise to supervised, repeated, or in-clinic exercise delivery.