Yes I agree - run 100k a week and your diet matters a lot less than if you do 3 x 5k runs a week, even though most would consider the latter to be a runner and

Yes I agree - run 100k a week and your diet matters a lot less than if you do 3 x 5k runs a week, even though most would consider the latter to be a runner and regular exerciser. But, run 100k a week for 10 years, and you may not need many more calories to keep it up than the 3x weekly jogger, because your body has adapted. I guess that is what the study in the article is observing.