I’m constantly comparing the eFTP here with the modeled number from Xert and there’s a very good correlation (the Full Frontal test in Suffer Fest also gave me very consistent results with eFTP)
Last week I did some hard efforts in the 30s range with breakthrough, and Xert bumped me up to 329W.
Over the weekend did a longer ride with a 22m full on effort and while that did not trigger Xert (which was already updated) it did trigger eFTP update in Intervals. The two numbers are scarily close (326W vs 329W)
I guess if I had updated my minimum interval for eFTP to under 30s it would have updated on Friday short intervals..
