Yes, HIT has been around a long time. I still haven’t seen the video.
The video was interesting, and a few years old now..
I guess the big thing it had in it that most articles etc on it don’t is the woman actually used it for i forget how many weeks, and while she did see fat loss, and VO2max improvements.. she also had her mitochondria compared and tested before and after as well, and the article does a good job of explaining what they are and why better functioning mitochondria is better...
I know its not NEW.. but I think the research around its affect on mitochondria is realatively new ~ 5 years or so.