Re: 5 exercises for awesome Abs
Certain athletes (such as those involved in combat sports) require extra core training. You can't stand after a well-placed left hook to the body unless you spend considerable time fixing that weakness. Most boxers and kickboxers also have great 6-packs. I don't think that's a coincidence. As such, if you want to develop a great midsection, then train it. Having said that though, yes, front squats, deadlifts etc all develop good strength via core stabilization. It's just a good idea to not limit yourself to specific means of training.
And yes, having low bodyfat is very helpful for having visible abdominals. But even if you get low BF you still need muscle there in order to have a 6-pack going on.