To see fast results you will need to do one of the programs intensively and not miss a single day. But it is important to know that you will need to improve your diet a lot as exercise alone is not enough. Make a start for the duration of a program to eat homemade food in the right quantities and you are for sure going to see the first results very quickly. This does not mean that in 2 weeks you will have 6pack.. for a well-shaped body you will need more time but the only sure thing is that exercise and proper nutrition will bring you much closer!