Thanks for bringing this up. It’s incredibly important. Vital, actually.
I’ll raise my hand here.
Absolutely, 100% ran into this issue when I upped my training to 17-20hrs per week. Even with a vast majority of my riding being low intensity with tight intensity discipline. I mistakenly combined this increased load with the idiotic goal of also reducing my bodyfat, it lead to signs of RED-S or overtraining etc. (these seem to rapidly becoming the same thing, essentially, sustained under fueling, a discussion thread on this would be fascinating)
I’ve since addressed the issue and now fuel, before, during and after virtually all sessions, regardless of intensity. It’s crazy how much I now consume, considering my size 60-62kg, 46y male. I basically have to consume something in the region of 10,000 calories, ON TOP OF my normal calorie intake.
Given I have, let’s say, undesirable food favorites, the highish training load lets me get away with a diet that would have myself, or even worse, a sedentary person, rapidly turning into a house sized individual.
I really think it needs to be loudly drummed into anyone upping their training load. Your calorie intake needs to be commensurate with your increased load. This can be almost shocking, as it’s a very significant and sustained increase in consumption.
Thanks for the links.