[brazzy]

> For sure, doping it's still a fear, but these guys cannot climb Galibier at that speed only with storoids/drugs, it's insane the effort that they did over the year.

The way I heard it, the don't use doping to improve their performance. They use it so they can train longer and more intensely than they would be able to without it.

[nradov]

That's part of it sure, but anything which improves oxygen transport like EPO or blood transfusions will absolutely improve climbing performance regardless of training quality. For anyone with good fitness the main limiting factor is amount of oxygen delivered to the muscles.