Schedule to progress


Searching the internet on how to make a program, it's said that you best stick to a certain schedule of weekly workouts in order to make your body progress in the exercises. And change it after 6 or 8 weeks.

But doing a program of FB, there's a whole range of different workouts offered during the program. Which is nice because of the variation. However, I'm a bit confused now. Can somebody explain? Maybe a topic for the FB BLOG too?