Intermittent fasting means that you limit the hours of the day that you eat -- in this case he's fasting for 16 hours of the day and allowing food intake for 8 hours.
I presume this means he has two meals -- a late dinner and an early breakfast.
Human growth hormone seems to be raised considerably after fasting for 16-24h which in turn supports strength training right after this period as the muscles grow naturally faster without any kind of "funny" supplements intake. Basically a body hack.
I presume this means he has two meals -- a late dinner and an early breakfast.
There are other models too, for example 20/4.