A study of nearly 80,000 participants found that aerobic exercise reduces symptoms of depression with an effect size nearly 70% stronger than antidepressant medications and psychotherapy.
Young adults (18-30) and new mothers with postpartum depression saw the most significant improvements. For depression, longer programs (over 24 weeks) at moderate intensity work best, while anxiety requires shorter programs (eight weeks or less) at lower intensity.
Running, cycling and brisk walking are most effective, but resistance training, yoga and tai chi also help. Exercising in groups or under professional supervision amplifies symptom reduction compared to solo or unsupervised activity.
Exercise affects the same brain chemicals as antidepressants (serotonin, dopamine) while also reducing inflammation. The psychological feedback loop of setting and achieving exercise goals actively disrupts the hopelessness of depression.
The study argues that doctors should prescribe exercise with the same specificity as medications (type, intensity, duration, frequency) and create structured support systems, as depression itself saps the motivation needed to start exercising.
In a sweeping analysis of nearly 80,000 participants, researchers at James Cook University in Australia have concluded that aerobic exercise reduces symptoms of depression with an effect size comparable to and in some cases exceeding that of antidepressant medications and psychotherapy. The findings, published in the British Journal of Sports Medicine, challenge the pharmaceutical-first approach that has dominated psychiatry for decades.
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