Does anyone know anything about copywriting a fitness program?

Yes, will most likely need to speak to an attorney. You will most likely not be able to navigate the copyright system alone. But I can tell you that most programs are not copyright-ing the fitness program. The copyright is on the name of the program and maybe the names of some of the exercises. For example, there are literally hundreds of kickboxing programs on the market. No one can copyright “kickboxing”. So, the big programs that can draw instructor students will name the program “Tom-kwando”. I purposely didn’t use an actual program name because I don’t want to get into a pissing contest over whether I am being derogatory to “Tom”. Getting a copyright on an exercise itself is virtually impossible. To do so you would have to prove that you are the only person to ever conceive of that movement. You can keep someone from using the name, but you can’t keep them from using the exercise or in all likelihood even the program itself. This information from my experience. I am not an attorney. But I have tried to do this and to patent a number of equipment ideas. The only protection as I understand it is that no else would be able to use the name for marketing or my specific design for the equipment. But alterations can be made and used whether I like it or not.