In early December I did two 40 minute assessments (What workout did you do today? (2020, part 2) - #3085 by trpnhntr) - TLDR version 359 and then 367 watts a week later
Since then I’ve done a block of polarized training (all intervals were short-shorts, so haven’t done a lick of threshold or any long duration intervals in nearly two months).
Re-did the 40 minute assessment today and averaged 367 again
0:00-10:00 - 361
10:00-20:00 - 363
20:00-30:00 - 370
30:00-40:00 - 373
Felt like I paced better than the second assessment, was a more even effort, although I was able to increase wattage a bit in the second half. Interesting to me how similar the efforts felt with nothing but the 30/15s for the six weeks in between
Hard to have any significant learnings when you test the same before and after. That said - I’m close to what my stable max FTP is (can get higher for peaks, but while training at this volume it rarely goes above the 360-370 range) so who knows