1 day arm cure

I’ve just read all about the one day arm cure and i must say I’m intrigued by it. I don’t think its something I could do as I’m stuck with tendonitis and I’m sure it’d cause it to flare up. Has anybody tried a similar thing with other body parts? Also I remember reading about on of the old time bodybuilders training calves and forearms between sets of exercise for other bodyparts, they’d do that for a week to give them a real bashing then rest for a week, anybody tried anything like that?