Does aerobic exercise effect pain sensitisation in individuals with musculoskeletal pain? A systematic review.

Researchers wanted to know whether aerobic exercise actually changes how sensitive the nervous system is to pain in people with ongoing musculoskeletal conditions. Pain sensitisation, the tendency of the nervous system to amplify pain signals, is a real feature of many musculoskeletal problems, but treatments that address it directly are scarce. The team reviewed 11 studies involving 590 people and found that every single one showed aerobic exercise led to measurable improvements in pain sensitisation.

On average, people experienced roughly a 10.6% reduction in pain sensitivity, though the range was wide, from 2.2% to 24.1%. The exercise in these studies was straightforward: walking or cycling at a moderate, submaximal intensity with gradual increases in effort, lasting anywhere from 4 to 60 minutes. What's perhaps most striking is that improvements appeared quickly, within just one session in some studies, and after 2 to 12 weeks in the longer trials.

A research team looked at whether aerobic exercise, the kind that makes your heart work a bit harder like walking or cycling, can actually change how your body processes pain signals. They studied 11 different research projects involving nearly 600 people with long-term muscle and joint pain, and found that in every single study, aerobic exercise improved how the body responded to pain.

Most people showed measurable improvements, with an average reduction in pain sensitivity of about one-tenth, though some people improved more and some less. What was encouraging was that changes happened quite quickly in some cases, sometimes after just one exercise session, though bigger improvements typically took a few weeks of regular activity.

It's also worth knowing that the type of exercise in these studies was fairly ordinary: steady-paced walking or cycling at a moderate level, done for periods ranging from a few minutes up to an hour. The researchers were honest about one thing though: while this evidence shows aerobic exercise does affect pain sensitivity itself, they couldn't yet say for certain whether this improvement actually translates into less disability or better quality of life in everyday living.

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

This systematic review presents consistent evidence across 11 studies that aerobic exercise produces measurable changes in pain sensitisation in musculoskeletal populations. The effect sizes are modest but potentially meaningful, with a median improvement of 10.6% in pressure pain threshold or pain ratings, and the majority of included studies carried low to moderate risk of bias, lending reasonable confidence to the overall finding.

The exercise protocols were relatively standard and accessible: submaximal intensity aerobic activity via walking or cycling with progressive increases, delivered over periods of 4 to 60 minutes. What distinguishes this finding is both its consistency across all studies and its apparent timeline: changes were detected after single sessions in observational studies and after 2 to 12 weeks in trials, suggesting neurophysiological responsiveness occurs relatively quickly.

That said, the gap between demonstrating a change in pain sensitisation and showing meaningful improvements in disability or quality of life remains unaddressed. The review authors themselves flagged this as a needed next step, meaning the clinical translation of these findings is still somewhat open.

For practitioners, this evidence suggests aerobic exercise may address one specific mechanism in musculoskeletal pain, though whether this translates to the functional outcomes that matter most to patients remains an empirical question.