Multiple meta-analyses find a real antidepressant effect, especially for more vigorous activity.
What the evidence shows
Skeptics long argued that studies of exercise for depression were biased — people who feel better naturally move more, and trials could not be blinded. So the interesting question is whether the effect survives careful correction.
Schuch et al. (2016) re-analysed the trials adjusting for publication bias and still found a large antidepressant effect of exercise. A more recent BMJ network meta-analysis of 218 trials (Noetel et al., 2024) confirmed that exercise — particularly walking or jogging, yoga, and strength training — meaningfully reduced depression symptoms, with larger effects for more vigorous activity, and worked well as an adjunct to standard care. Exercise is not a replacement for treatment in severe cases, but the claim that it genuinely helps depression is well supported.
Sources
Schuch, F. B., Vancampfort, D., Richards, J., et al. (2016). Exercise as a treatment for depression: A meta-analysis adjusting for publication bias.
Journal of Psychiatric Research, 77, 42–51
Even after adjusting for publication bias, exercise produced a large antidepressant effect.
DOI: 10.1016/j.jpsychires.2016.02.023 →Noetel, M., Sanders, T., Gallardo-Gómez, D., et al. (2024). Effect of exercise for depression: systematic review and network meta-analysis of randomised controlled trials.
BMJ, 384, e075847
Across 218 trials, exercise (especially walking/jogging, yoga, strength training) meaningfully reduced depression, with dose-dependent effects.
DOI: 10.1136/bmj-2023-075847 →