Many (most?) NFL players walk away with horrific brain damage and extreme physical injuries. Sitting still for 9h/day certainly isn't great for your health, but

Many (most?) NFL players walk away with horrific brain damage and extreme physical injuries. Sitting still for 9h/day certainly isn't great for your health, but there are things you can do to counteract it - go to the gym, for example. NFL players can't avoid those injuries.