Hey, what do you do when your reach level 30 and you can do it without any problems?
After level 30 you should have the knowledge of calisthenics as well as your own body so you will know what the next progressions are. Or you could re-do the workout program with extra weight on the basics or something like that.
Besides, I believe Chris is making an expansion from lvl 31-40.
okay, thank you for you support.