Tread the isometric path.
To be able to get that beautiful six-pack, you must also add isometric moves in your routine. It is called the Weider Iso-Tension Principle and the whole idea of isometrics is to flex the body part (in this case, the abs) just like how those Mr. Universe’s do it on stage and leave it like that for a few seconds. How is this done? You just have to flex the muscles for at least six seconds and at most ten seconds, then, rest for the same amount of time. Repeat this move for 10 to 20 times.