It's funny, theres always debate how to do abs and of course how often you do them.. All I have to say after doing heavy ABs 2x a week 2 sets for 8-10 reps to failure with a DB on my chest they are starting to change... and they are definately helping out my core lefts (deads,squats, etc)

Definately better than doing 3000 reps w/ no weight every other day, imo...