I have a bodybuilder friend who is also a military fitness instructor. Since I am mostly sedentary (in front of a PC) kind of person and quite overloaded with work, I have obviously gained weight. I am also unwilling to spend time hitting the gym.
So he suggested doing the following:
1. After waking up, the first thing to do, run for about 30 minutes and do it slowly, to not go over 110-120 bpm to use up all 'leftovers' of the yesterday's supper 'food' inside my blood and boost up metabolism.
2. Drink black coffee without sugar to keep metabolism increased for longer.
3. Last as long as I can before the first meal (additional black coffees are ok).
The idea he presented that conditions necessary for one to start burning his own fat is no food in the bloodstream and no heavy load on body otherwise it will start burning muscle instead.
My wife claims that not eating and drinking coffee will ruin my stomach and heart.
How tenable is this sort of diet and what are health implications?