http://www.columbusmmug.com Wed, 01 Sep 2010 10:27:27 +0000 http://backend.userland.com/rss092 en Anytime you exercise, your brain releases chemicals known as endorphins that produce a feeling of euphoria, which is known as "runners high", which is also very easy to become chemically addicted to.  Without this rush, you'll feel irritable and out of it until you exercise again.  ... http://www.columbusmmug.com/exercise-and-harm/