OK. But wouldn't this suggest athletes are real smart?-----The more intensely you exercise, the bigger and stronger your brain grows - even in old age - Brain Tomorrow

The more intensely you exercise, the bigger and stronger your brain grows - even in old age - Brain Tomorrow

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  Study reveals that in older adults, even 20 minutes of moderate physical activity can protect against cognitive decline
  
• It’s widely-known that exercise has a positive effect on the body and metabolic health. 
• ...Study authors say that with more intense physical activity, the larger the brain regions actually were in volume and thickness of cortex..."