Exercise is an antidepressant. A new meta-analysis of 26 randomized controlled studies found that both aerobic and resistance training significantly reduced symptoms of depression and anxiety, often rivaling standard treatments like medication and therapy. Although both modes were beneficial, aerobic exercise had a slightly greater impact on depression, while resistance training showed a modest edge for anxiety. Many of the included studies didn't even meet the minimum weekly physical activity recommendations for aerobic or resistance exercise, and even then, reduced depressive and anxiety symptoms significantly. For those with depression or anxiety, movement is powerful medicine. And the dose needed might be smaller than you think.