Avoid The 'Bonk': Running A Marathon Scientifically

"Bonking" or "hitting the wall" is that awful moment when marathoners run out of gas. They've used up all of the carbohydrate fuel stored in their liver and muscles, and their bodies are forced to switch, painfully, to burning fat. Now a marathoning Harvard-MIT student has figured out how to calculate that point.

Source: http://www.npr.org/templates/story/story.php?storyId=130731888&ft=1&f=100

Carl Levin Carte Goodwin Chuck Grassley Chuck Hagel Chuck Schumer