Chronic pain affects around one in five adults worldwide and remains one of the leading causes of disability. Medication can help some people, but its effects are often modest, and long-term use can bring significant risks. This has increased interest in safer, non-drug approaches—especially exercise.

A major review has now brought together evidence from 157 systematic reviews, 2,736 randomised controlled trials and more than 220,000 participants. It examined exercise across a wide range of pain conditions and exercise types.

The overall conclusion was strong: exercise reduces pain across many populations and conditions, and the benefits appear across many different forms of movement.

Exercise produced meaningful pain relief

Across 144 meta-analyses involving nearly 200,000 participants, exercise produced a large overall reduction in pain immediately after treatment.

The effect remained meaningful even after adjusting for possible publication bias. The certainty of the evidence was rated as moderate, mainly because many of the included reviews were methodologically weak or of low quality.

Importantly, exercise helped across a broad range of conditions, including:

• low back pain
• knee and hip osteoarthritis
• fibromyalgia
• neck pain
• migraine and headache
• rheumatoid arthritis
• cancer-related pain
• pregnancy-related pain
• primary dysmenorrhea
• osteoporosis
• chronic musculoskeletal pain

The benefits were not restricted to one diagnosis or one type of patient.

Many types of exercise can help

The review found significant pain reduction across almost every exercise category examined, including:

• aerobic exercise
• resistance training
• Pilates
• yoga
• tai chi
• aquatic exercise
• mixed exercise programs
• dance
• high-intensity interval training
• virtual-reality exercise
• telehealth-delivered exercise

This is clinically important because it suggests that there is no single “best” form of exercise for pain.

The most suitable program may be the one that matches the person’s preferences, capacity, confidence and circumstances.

Some exercise types appeared to produce larger effects, including dance, Pilates and tai chi. However, these findings should be interpreted carefully because some were based on only one or a small number of systematic reviews.

Lower intensity may be enough

One of the most practically useful findings was that low-intensity exercise produced greater pain relief than moderate-to-vigorous exercise.

This does not mean harder exercise is harmful or ineffective. It means that people do not necessarily need to exercise intensely to experience pain relief.

For many patients—especially those who are fearful of movement, deconditioned or worried about symptom flare-ups—starting gently may be both more acceptable and more effective.

The results support a simple principle:

Start with an amount the person can tolerate and repeat confidently.

More is not always better

Programs lasting less than 12 weeks showed larger pain reductions than longer programs.

Similarly, programs involving less than 120 minutes of exercise per week appeared to produce greater pain relief than those involving higher weekly durations.

These findings should not be interpreted to mean that exercise stops working after 12 weeks or that longer programs are inferior. A more likely explanation is that adherence decreases over time or that participants receive less support once the structured phase ends.

The finding may reflect the importance of engagement rather than the biological superiority of shorter programs.

For therapists, this reinforces the value of beginning with manageable, achievable doses rather than overwhelming patients with ambitious targets.

Frequency and session length were flexible

The review found no meaningful difference between exercising one to two times per week and three or more times per week.

There was also no significant difference between sessions shorter than 60 minutes and sessions lasting more than 60 minutes.

This gives clinicians considerable flexibility.

A useful exercise prescription does not need to be rigid. It can be adapted around the patient’s daily routine, fatigue, pain sensitivity and access to facilities.

For some people, one or two short sessions may be a realistic starting point. Others may prefer more frequent activity. Both can be reasonable.

Exercise helped both acute and chronic pain

Exercise reduced both acute and chronic pain, with no statistically significant difference between the two categories.

This suggests that exercise may have analgesic effects beyond long-term conditioning and strengthening.

Possible mechanisms include:

• release of endogenous opioids
• changes in serotonin and norepinephrine
• activation of the endocannabinoid system
• reduced systemic inflammation
• altered central pain processing
• improved confidence and reduced fear of movement
• better sleep, mood and general health

Exercise is therefore not only a way to strengthen tissue. It also acts on multiple systems involved in pain regulation.

Exercise should not be reduced to “just move more”

Although the evidence is strong, vague advice such as “stay active” is unlikely to be enough.

Exercise should be prescribed with the same care as medication. That means considering:

• the person’s goals
• preferred type of movement
• current capacity
• symptom behaviour
• previous experience
• confidence and fear
• likely barriers
• progression over time

The most effective prescription may not be the technically perfect program. It may be the one the person understands, tolerates and continues.

Exercise is not a cure-all

The review does not show that exercise eliminates pain for everyone.

Response will vary according to the condition, severity, function, adherence, comorbidities and personal context. Exercise should therefore be part of multimodal, patient-centred care rather than presented as a universal cure.

Some patients may also need medication, education, sleep support, psychological care, pacing, manual therapy or other interventions.

The key point is that exercise deserves a central—not token—role in pain management.

Important limitations

The review was very large, but it also had limitations.

Most of the included systematic reviews were rated as low or critically low quality. There was substantial heterogeneity, meaning that studies differed greatly in populations, exercise programs and pain measures.

There was also evidence of publication bias, although the pain-reducing effect remained meaningful after adjustment.

Long-term outcomes were often poorly reported, so less is known about how long benefits persist after structured programs end.

The subgroup findings about low intensity, shorter duration and lower weekly volume are therefore useful but should not be treated as rigid dosing rules.

They are better interpreted as signals that modest, manageable exercise can be effective.

What this means for therapists

The main clinical message is not that every patient needs the same exercise program.

It is that exercise should be treated as a legitimate analgesic intervention, with enough flexibility to fit different patients and conditions.

Therapists can begin by asking:

• What movement does this person enjoy or tolerate?
• What dose feels achievable?
• What is likely to build confidence rather than provoke fear?
• How can the program be sustained?
• What support is needed to keep the person engaged?

For many patients, the best starting point may be low-intensity movement performed for a manageable amount of time.

From there, exercise can be progressed according to symptoms, goals and capacity.