@eduardo23
1.3 - 1.8 mmol/L. So not Coggan Zone 2. Overlap? Sure. I regularly (last 12-14 months) do this sort of training (although I use 2mmol/L ceiling), and it puts me at between border of Zone 2/3 and mid Zone 3.
Great question because many ppl read that old San Millan article and often think he is recommending just riding around in Coggan Zone 2.
It is not. Trouble with trying to “convert” it is that San Millan is most definitely not using a fixed percentage of FTP (or FTP at all), he’s using our old friend lactate.