i agree with the developement part i have been as high as 12% body fat and there always there i used to do them like crasy but my obliges (is that how u spell it) started to get to big making my waist looking think. If there not I have to get down to under 6% bodyfat to see all my abs and one of my work out parterners is at 10% and is abs look just as ripped ALL DEVELOPEMENT BRO SO DO THEN HARD.