The best six pack workout is one that involves the whole body and not just your six pack.
A workout that is targeted directly at the six pack will only strengthen the muscle so much.
The visibility of them depends on how much belly fat you have.
The reason you must do a whole body workout because each exercise effects your body in a different way.
You will be able to burn fat faster getting rid of that belly fat.
Everyone actually has a six pack but you just can't see it because it is hidden.
You must change your diet because your body will store all the fat of all those junk foods.
By eating healthier and burning more calories then you take in will shed the body fat and you will get a six pack.
Most people lifestyles now days don't just get a six pack without trying.
They must be doing their six pack workout correctly to obtain six pack abs.
The lifestyle of eating and exercising will need to be changed.
You can not just take some pill that will shed your belly fat.
First you could start off by walking or jogging to lose some of your body fat.
After you have lost enough weight, you will start to be able to see your six pack.
You must keep doing your regular six pack workout but now you can do more exercises that target the ab area.
This will strengthen the ab muscles so your six pack will get bigger.