This is a first in a series of five episodes that will take an in-depth look at one of the brain chemicals first mentioned in Episode 139 (http://RunningAFEVER.com/139).

Endorphins are defined as any of a group of hormones secreted within the brain and nervous system and having a number of physiological functions. They are peptides which activate the body's opiate receptors, causing an analgesic effect.

What does that mean? It's gets you high!

Read the full post at http://RunningAFEVER.com/150