Physical activity has been firmly established as an effective intervention for a range of mental health conditions, including major depressive disorder, anxiety disorders, and stress-related illness. The World Federation for Mental Health endorses physical activity promotion as an accessible, low-cost mental health strategy with broad applicability across populations, settings, and income levels — and calls for its integration into routine clinical care worldwide.
A landmark meta-analysis published in JAMA Psychiatry (Schuch et al., 2016), incorporating data from 25 randomised controlled trials, demonstrated that exercise produced significant antidepressant effects in individuals with depression, with an effect size of 0.68 — placing it firmly in the moderate-to-large range. A subsequent large-scale meta-analysis by Choi et al., also in JAMA Psychiatry (2020), found that even modest increases in physical activity were associated with a meaningfully reduced risk of incident depression.
The mechanisms underlying exercise-related mental health benefits are multifactorial. Neurobiological pathways include increased neuroplasticity, modulation of the hypothalamic-pituitary-adrenal axis, and improvements in sleep and self-efficacy. Psychosocial mechanisms — including enhanced social engagement and the development of mastery — also contribute significantly. The World Federation for Mental Health regards this evidence base as sufficiently robust to mandate clinical action.
WHO physical activity guidelines recommend at least 150 to 300 minutes of moderate-intensity aerobic activity per week for adults. Yet global data from WHO (2022) indicate that approximately 27.5% of adults remain insufficiently active. Disparities in physical activity levels are pronounced across income groups and between urban and rural populations — disparities that directly compound existing mental health inequities.
The World Federation for Mental Health calls for mental health systems to incorporate physical activity guidance into routine clinical encounters and for public health policies to address the environmental and structural barriers that limit participation. In low-income and underserved communities in particular, investment in safe, accessible physical environments is a mental health investment — and must be recognized and funded as such.