Exercise Is Underrated as Therapy

The evidence for exercise as a treatment for mild and moderate depression is no longer fringe. Multiple meta-analyses now place its effect size in roughly the same range as first-line antidepressant medication, with none of the side-effect profile and a long list of secondary benefits.

The mechanisms are layered. Exercise increases brain-derived neurotrophic factor, a protein involved in mood regulation and neural growth. It improves sleep, which itself is a major lever for mood. It produces a reliable sense of accomplishment, structures the day, and often involves social contact. Each of those is therapeutic on its own.

The minimum effective dose is lower than people fear. Three sessions of moderate exercise per week, lasting thirty to forty-five minutes, is enough to register the mood effect within four to six weeks. This is not a replacement for professional care in serious cases. But for the everyday low-grade malaise that affects so many adults, it is one of the most reliable interventions available, and it costs no more than a pair of shoes.