I've heard from a local coach that riding at the top end of z2 (or even low z3) isn't really giving you appreciably more adaptation than at the low end. So, I think there are maybe diminishing returns to that. My riding time is going to drop appreciably fairly soon, so I will likely have to sub some longer zone 2 rides for SST type work. But even then, I can't see much point in riding mid to high z2.
I am also in the 300 w FTP camp, usually a bit less, or a touch higher if I'm really good. My z2 rides are usually in the 150 to 160 w range in AP. My best ever 20 min was 325 w (at 65 kg).
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"Your beauty is an aeroplane;
so high, my heart cannot bear the strain." -A.C. Jobim, Triste
Last edited by TMonk; 08-01-23 at 12:15 PM.