How to have perfect abdominal muscles?

How to do training exercises correctly is as important as which training exercises to choose.

Perfect abdominal training should include at least 4 types of movements: training for the upper half of the abdomen, such as sit-ups;

Training for the lower half of the abdomen, such as hanging lifts Legs; training for the side abdomen, such as twisting sit-ups; training for the transversus abdominis, such as plank support.