It is virtually impossible to patent/trademark a fitness program. What you can protect is the name of the program. Which is a big deal if the program catches on and people want to teach it to capitalize on the popularity.
As I understand it you can’t copyright a name like kickboxing or step aerobics. It can’t be a standard discriptive phrase. Copyright/trademarks in fitness are always things like TRX, Beach Body, etc.
You can teach the exact same moves as a trademarked/copyrighted program, but can’t use their name, music, promotional materials, etc.
I am not a lawyer, so I would not assume that this is correct information. But I was told this years ago in a similar situation.