Exercise works for depression. The effect is moderate, not miraculous
Cochrane pooled 73 trials in January 2026. Exercise beat no treatment by a moderate margin. Restricted to the seven best-designed trials the effect was smaller - and still there.
We have not finished checking this source. No judgement either way. how we score evidence
Caveat on this rating: The "as effective as antidepressants" claim cannot be made from this review and is refused here. Its head-to-head comparisons are underpowered: exercise vs medication is 5 trials and 330 people (SMD -0.11, 95% CI -0.33 to 0.10, low certainty); exercise vs psychotherapy is 10 trials and 414 people (SMD 0.03, -0.16 to 0.23, moderate certainty). Absence of a detected difference in small trials is not evidence of equivalence - those intervals are wide enough to hold a meaningful advantage either way. A real non-inferiority trial: COBRA (Richards, Lancet 2016) randomised 440 people against a pre-specified 1.9 PHQ-9 margin. Nobody has done that for exercise versus antidepressants. Also recorded here: adverse events included musculoskeletal injuries and depression among those exercising. The 2013 version put the robust-trial subset at -0.18 and non-significant; the 2026 update puts it at -0.46. The effect attenuates under good methods; it no longer disappears.
Exercise reduces depression symptoms. The best current review says so, and also says how confident it is: not very.
Cochrane published its update in January 2026 - 73 randomised trials, at least 4,985 people. Against no treatment or a control condition, exercise cut depressive symptoms by a standardised effect of -0.67. Cochrane graded that evidence low certainty.
Then the reviewers did the honest thing. They re-ran it using only the seven trials that concealed who got what, counted everyone they randomised, and used raters who did not know which group a person was in.
-0.46 in the seven best-designed trials
The effect shrank. It did not vanish. That is the most useful sentence about this whole literature.
Why it shrinks: you cannot blind an exercise trial. Everyone knows whether they went for a run. Cochrane judged all 73 studies at high risk of exactly that problem.
Worth asking
Nothing here is a reason to stop or change a medication. If you want to add movement to treatment you are already getting, that is a conversation with your prescriber - an addition, not a swap.
Source
Exercise for depression — Clegg AJ, Hill JE, Mullin DS, Harris C, Smith CJ, Lightbody CE, Dwan K, Cooney GM, Mead GE, Watkins CL (2026)
Read the source: https://doi.org/10.1002/14651858.CD004366.pub7
DOI: 10.1002/14651858.CD004366.pub7
How this was scored
- Study design
- Meta-analysis of randomised trials
- Funding
- not recorded
- Published in
- not recorded
- Sample size
- 4,985
- Preregistered
- not recorded
- Conflicts disclosed
- not recorded
- Independent of proponent
- not recorded
- Retracted
- No
We have not finished checking this source, so there is no scoring to show yet. “We have not checked this yet” and “this is disputed” are different statements, so no scored band is shown rather than a low one.
Read the full scoring rubric, including what it can't tell you.
Published August 31, 2026.
Questions
How strong is the evidence behind this?
Resolv rates this source "not yet assessed". We have not finished checking this source. No judgement either way. One caveat travels with that badge: The "as effective as antidepressants" claim cannot be made from this review and is refused here. Its head-to-head comparisons are underpowered: exercise vs medication is 5 trials and 330 people (SMD -0.11, 95% CI -0.33 to 0.10, low certainty); exercise vs psychotherapy is 10 trials and 414 people (SMD 0.03, -0.16 to 0.23, moderate certainty). Absence of a detected difference in small trials is not evidence of equivalence - those intervals are wide enough to hold a meaningful advantage either way. A real non-inferiority trial: COBRA (Richards, Lancet 2016) randomised 440 people against a pre-specified 1.9 PHQ-9 margin. Nobody has done that for exercise versus antidepressants. Also recorded here: adverse events included musculoskeletal injuries and depression among those exercising. The 2013 version put the robust-trial subset at -0.18 and non-significant; the 2026 update puts it at -0.46. The effect attenuates under good methods; it no longer disappears. The score is calculated from recorded facts about the source — study design, funding, publication venue, sample size, preregistration — not typed in by an editor.
What is the source for this?
Exercise for depression — Clegg AJ, Hill JE, Mullin DS, Harris C, Smith CJ, Lightbody CE, Dwan K, Cooney GM, Mead GE, Watkins CL (2026). DOI: 10.1002/14651858.CD004366.pub7. The full source is linked on this page so you can read it yourself.
Who paid for this research, and does that matter?
Study design: Meta-analysis of randomised trials. Funding: not recorded. Independence from the proponent is not recorded. Industry sponsorship is one of the most reliably measured biases in medicine, which is why funding carries real weight in the score rather than sitting in a footnote.
Is this medical advice?
This is information to bring to your prescriber, not medical advice and not a reason to change anything on your own. Nothing here is an instruction to stop or reduce a medication. If you are in crisis, call or text 988.
This is information to bring to your prescriber, not medical advice and not a reason to change anything on your own. Nothing here is an instruction to stop or reduce a medication. If you are in crisis, call or text 988.