I’m not sure I agree entirely with the BBC summary, given the assumptions made in the study. No barriers have been found, in fact no barriers have even been tested in the study. This is a statistical trend only, surely?
Nordic skiers and TdF cyclists buck that trend at 3-5x BMR
I’m also not sure that cyclists are on a break in between major tours.
Also, regarding the TdF analysis:
“While neither group exceeded the apparent SusMS ceiling (Fig. 1A), it is unclear whether their above-average energy intake reflects special nutritional strategies (e.g., infusing glucose intravenously) or individual biological variation. Second, the signaling mechanisms linking energy imbalance to the body’s central regulation of activity, and that ultimately prevent humans from exceeding the observed SusMS versus duration curve, remain unknown.”