Ab training has becoming the most complicated and silliest thing I have ever seen recently and it drives me nuts!! People are writing whole damn books on ab training. I do think these books have some merit. However, for the VAST majority of people out there some type of simple ab training, done 2-3 times a week, hypocaloric diet, and some kind of cardio, are all that is needed to get “good” abs. First off, everyone has visible abs. The reason why you can’t see yours is because fat is covering them up. Lose fat, and you’ll see your abs. Ever seen pictures of starving or wasting individuals. They have awesome abs, and they sure as hell aren’t doing fucking leg raises. Make three exercises your core for ab training: crunches (regular, reverse, and oblique). There are five hundred variations of these, but you can do them on your floor right now and they will produce very similar results as any other variation. Ad some form of cardio in (running, sprinting, biking, walking, etc) for around 25-30 minutes a day 5-6 times a week and wam fam dango you will have abs! Jus stick to everything above as long as possible without cheating and you will yourself a six pack. Simple yes, easy, no!