Reminds me of cut/bulk phases for bodybuilders, but without the heavy lifting. I did that, got to 100kg eating mostly meat and rice and potatoes and milk and cereals and bread, and lifting heavy. Then went back down to 75kg, part low-cal same diet, part zero-carb all-meat, still lifting heavy.

Low-cal worked, then stopped working at around 90kg. Then I read Atkins and GCBC, never went back to the calorie theory. Then got sick, lost my appetite, grew fatter a bit.

I've seen both the eat-more-grow-fat and the eat-less-grow-fat. And I've seen both the eat-less-cal-grow-lean and the eat-zero-carb-grow-lean. This ain't calories or willpower or any other stupid idea like that. It's pure physiology and biology and biochemistry, just gotta figure out how it works.

That guy probably still believes it's all about calories and willpower and thrifty gene and all that stupid stuff. But then, he probably hasn't hit the wall yet.