High-intensity activities are more powerful when performed less frequently, with diminishing returns on daily or frequent practice.

“So, for the less often you do them, the more powerful they are. In fact, if you get into a very hot sauna for four 30 minute sessions on one day. So you go 30 minutes, get out for five minutes. 30 minutes, get out for five minutes. 30 minutes, get out for five. Two hours a day in the sauna, that's a lot of sauna, but the growth hormone release from that type of protocol is a 16x increase in growth hormone. This has been measured in humans. Whereas if you do it every day or three or four times a week, you get diminishing returns on that.”