David Blaine's body is reportedly not ready for the enormity of his next stunt, which is to attempt to stay awake for 13 days. The original date was to take place in May, but has been pushed to sometime next fall so he can get in shape.
Seems weird that someone would need to get in physical shape for such a stunt, but it's true. David is running and dieting, and has lost 35 lbs already. That's one way to do it. Or get in touch with Britney. She's the master of staying awake for days.