This is very sensible.
As opposed to just SOME days if you've eaten too much pizza? HOT-ROX IS a long-term supplement, so a 4-week span is probably a minimum for results.
I think I can recall Shugart talking about using it for only a day (or two) after indulging, but keep in mind that he has already put himself into a lean state. If you aren't there yet, you should consider using ir regularly while starting this lean eating phase.
That having been said, it's also been mentioned that it's healthy to take yourself OFF some supplements every 12 weeks, in order to avoid a tolerance for it OR to avoid developing an adverse reaction. Keep that in mind.
Good luck; tell us how it goes.