I think Arthur De Vany talks about this. And if I'm correct, one of the main reasons to fast after the workout has to do with insulin (protein also causing an insulin spike), and insulin causing growth hormone levels to drop.

EDIT Just an addition: Mark Sisson has a post on post-workout fasting here http://www.marksdailyapple.com/post-workout-fasting/

hope this helps

I think Arthur De Vany talks about this. And if I'm correct, one of the main reasons to fast after the workout has to do with insulin (protein also causing an insulin spike), and insulin causing growth hormone levels to drop.