What goes on inside your brain when you exercise? A lot of good stuff, suggests a new study. Your brain produces Noggin when you exercise, and Noggin counteracts BMP (not good for the brain)... and I'll let the The New York Times take it from there:
Your Brain on Exercise
July 8, 2010 — 18:00 PM
But how much exercise?
You can read the entire article at The New York Times