When I was in ISKCON around 1980, a devotee could not do breath infusion, or he would be expelled from the community. It is interesting that you can do it before mangala artik.

For that matter originally pujaries and attendees of such functions were required to do pranayama before approaching the deity or before doing gayatri mantras.

Now the system is to take a physical bath and rattle some mantras and then go see the God. Pranayama is subtle bath but you have to be advanced to understand that.