What you need to know about exercise slows brain aging by 2 years—and fixes depression better than you think
## Exercise Slows Brain Aging by 2 Years—And Fixes Depression Better Than You Think What if your workout was doing more for your brain than any nootropic stack? New umbrella review data shows that exercise delivers effect sizes for depression (SMD = -0.61) on par with pharmaceutical interventions—and resistance training...
## Exercise Slows Brain Aging by 2 Years—And Fixes Depression Better Than You Think
What if your workout was doing more for your brain than any nootropic stack? New umbrella review data shows that exercise delivers effect sizes for depression (SMD = -0.61) on par with pharmaceutical interventions—and resistance training can literally turn back your brain's biological clock.
## Key Findings
The evidence here is both broad and consistent. An umbrella review that synthesized 63 meta-analyses (1,079 RCTs, 79,551 participants) found that exercise produces moderate-to-large effects on depression symptoms (SMD = -0.61, 95% CI -0.69 to -0.54) and moderate effects on anxiety (SMD = -0.47, 95% CI -0.59 to -0.36). For context, an effect size of 0.6 is considered clinically meaningful—comparable to many antidepressant medications.
Aerobic exercise consistently outperformed other types for both depression and anxiety. Interestingly, the greatest improvements in depression were seen in emerging adults (18-30) and postnatal women, and group-based or supervised sessions led to better outcomes than solo training. For anxiety, shorter and lower-intensity sessions were more effective than high-intensity workouts—showing that more isn’t always better.