My abs are always very sore after a few sets of heavy presses and if I do abs after that, they start cramping up.Weighted ab exercises versus body weight only is an ongoing debate, and I have no idea which side of it I am on yet.If you do body weight only ab exercises, what else is there other than crunches and leglifts?I like to do sit-ups on a pretty steep incline bench, like 60 degrees or so.