I've been told and read it too, that white bread is bad. But is it okie to have wheat bread??

I workout every alternate day. and i work abs everyday. ab workout consists of crunches, hip thrusts, Leg kick outs and double crunches (20 reps each, 2 sets). problem is that how much ever i do exercises for abs, lower or upper slouches out. I do have a lil bit of fat to burn off. Can anyone help m...