run forrest run !!!
its the only way, cardio will give you a six pack even if you dont include any sit ups. Technique accounts for a lot of the build and so the shape of the muscle group but definatly theres no point running if you dont have a couple of cakes for breakfast and Micky D in bed, you know!!
Well, diet is important, but as excercise released Endorphins the same release must be felt ON OCCATION from the stomach.
Cycling very hard on the stomach and back if you can keep you posture correctly, i usually have like a sara lee or pie waiting at home to motivate me.
mmmmm cake.....