I know this is a long clip to listen to, but I found it super interesting. Here's the description, at the very least:
Could popping a pill turn you into a long-distance runner? Researchers report that they have identified two signaling pathways that are turned on in response to exercise — and that artificially turning those pathways on in mice produced rodents with much greater endurance.
Link: http://www.npr.org/templates/story/story.php?storyId=93158262
