Leg lifts: Lie on your back with arms out to your sides while lifting and lowering your legs slowly. Pull your belly button to the floor for best results.
Try using leg lifts. Lay flat on your back and raise your legs off the floor six inches and hold it there. Another good exercise is to lay on the floor on your side and raise one leg 12 inches and hold it and then slowly lower it again.
Crunches are unlikely to be effective unless done with the strictest form. Instead, try using a decline bench and slowly perform sit-ups, emphasizing the tight contraction of the abdomenal wall.
Tigher abs can be gotton from doing sit ups. Also, I have gone to the toning tables and these have worked great in firming up abs as well as legs, arms, etc. The abs are hard to get tightened, but these work great.
