Ran across this story recently. Here's the jist.
People's reaction times are a far better indicator of their chances of living a long life than their blood pressure, exercise levels or weight, researchers have discovered.
Men and women with the most sluggish response times are more than twice as likely to die prematurely.
The researchers suggest that people's reaction times are a measure of their intelligence, which in turn is an indicator of their body's 'system integrity' -- how well it is wired together.
What does this mean for gamers? I think it's pretty obvious. It's time to put down the Wii Fit and diet soda and pick up the pizza and H2i. I'm not recommending this, mind you. Science is.