Researchers have a new explanation for why exercise reduces depression. A study published in July suggests that exercises may exert anti-depressive effects by reducing brain inflammation and cultivating motivation. Study lead author Emily Hird, who has a doctorate in cognitive neuroscience and is a research fellow at University College London (UCL), said the positive effect of aerobic exercise has been demonstrated through randomized trials.
Still, the specific biological and psychological processes are not well understood. “Several studies indicate that dopamine transmission is enhanced by physical activity, in particular aerobic exercise, indicating this as a potentially useful alternative method to boost dopamine and increase motivation in depression,” they wrote. The researchers said in the study that exercise is well-suited to early intervention for depression because of its low cost.
It may also have beneficial effects on physical health conditions potentially linked to depression, such as obesity. Exercise also improves self-esteem and reduces stress. Dr.
Karl Benzio, a psychiatrist and medical director of a Florida residential treatment center who was not involved in the study, said exercise can be a key component of the treatment plan for mild and some moderate depression. Benzio also affirmed that exercise releases dopamine and adrenaline, chemicals that provide uplifting feelings. Exercise dramatically improves blood circulation to the brain, supplying it with .