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Meta-Analysis: Efficacy of exercise modalities in major depressive disorder treatment

20 Mar, 2024 | 17:54h | UTC

Study Design and Population: This article presents a systematic review and network meta-analysis of randomized controlled trials to assess the optimal dose and modality of exercise for treating major depressive disorder, comparing its effects to psychotherapy, antidepressants, and control conditions such as usual care or placebo. The review included 218 unique studies encompassing 495 arms with a total of 14,170 participants who met the clinical cutoffs for major depression.

Main Findings: The findings revealed moderate reductions in depression symptoms for several exercise modalities when compared to active controls. Notably, walking or jogging, yoga, and strength training demonstrated the most significant effects. The effectiveness of exercise was found to be proportional to the intensity of the activity prescribed. Among these, yoga and strength training were identified as the most acceptable modalities for participants. However, the overall confidence in these results is low due to the high risk of bias in the included studies, with only one study meeting the criteria for a low risk of bias.

Implications for Practice: The study concludes that exercise, particularly walking or jogging, yoga, and strength training at sufficient intensities, can be an effective treatment for major depressive disorder. These modalities could be recommended alongside traditional treatments such as psychotherapy and antidepressants. Future research should focus on blinding participants and staff to mitigate expectancy effects and improve the reliability of findings. The inclusivity of exercise as a core treatment for depression could significantly impact treatment strategies and patient outcomes.

Reference: Noetel, M., et al. (2024). Effect of exercise for depression: systematic review and network meta-analysis of randomised controlled trials. BMJ, 384, e075847. DOI: https://doi.org/10.1136/bmj-2023-075847. Access the study here: [Link]


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