exactly...after intense resistance training the body has depleted its energy reserves, thus being a good time to add in some cardio to eat up some fat. I do 20min after each training session before PWO shake and its been working great...just dont go nuts and run some marathon after lifting...remember the muscles you just trained are starving for nutrients so prolonging them from getting that nurtients would be a bad thing, 20-30min is fine but anything over that is a little much IMO