I realise that i'm overtraining my abs but i'm not doing hugh amounts each day just 120 full crunches and the 60 side bends. Time really is a limiting factor, just do 20 mins before setting off to work, which leaves me the evenings to complete my weight training. Doing this regime seems to work for me my waist is 30", although could do with my abs being slightly more cut but think that's to do with bf% and would need to change diet and add more cardio to cut.