im still natural here but eat every fucking thing in site. if i want it i eat it, even when slin is active. i cant gain any more fat than i have right now, i think its impossible for me because im way over maintanance levels of cals, by around 2k actualy. funny thing is i wont gain any more than i have no mater what but it kills me to lose the little bit i have, and its all on my love handles and lower abs. i can see the top 4 abs no prob, then i got a lil tire goin on. but if i did gain fat easy i would get too overboard, maybe alow myself to gain a few %. as far as one day of cardio, it wont hurt gains and be at least slightly helpful for cardiovascular health but dont count on it doing much for fat loss.