https://through-the-interface.typepad.com/through_the_interf...
(just the first one that came up on a Google Search)
This doesn't look like a fit and healthy man and I don't some that isn't fit and healthy should dole out advice on how to control a chaotic system such as human physiology using engineering.
Perhaps - and this is a theory I subscribe to: less fat/weight loss isn't what we're trying to achieve as a goal. Perhaps just being fit is. And fit looks different for different people because genetics. And what I mean is, is there lean muscle mass on a person's body (irregardless of % of fat, to a large degree). If I look at this photo of Mr. Walker, to me he looks skinny fat, which I think is just as bad as being "fat".
Just as an idea - as one who has a BMI of 25.8 and who could also run a marathon, then pump out 10 or so pullups. I think fat % or weight in general is just the wrong metric to use.