This method for getting fit is going viral. Probably because it's easy and flexible. The "two day rule" means not skipping two days in a row. Solid idea for creating a habit for health or anything else.
Creating habits is a difficult thing to do. And off days, or cheat days work for me. I think my favorite was him eating three cookies at one time for his example of an off day. I'm a big boy and I don't think I've ever eaten 3 cookies like that, LOL.
Check out the video, but caution language nsfw