It is time to update my ftp data. My last ftp (Feb) was done on a trainer where it is easy to generate a pretty flat power output (average power and nomalized power being roughly the same). I'd like to now do it outdoors 'in the real world'. But around here pretty much everything is one continuous roller. There are certainly no long climbs and (for the most part) pretty much no long flats either (15 to 45 seconds up, less than that down, repeat till done).
Coggan's 20 minute ftp methodology uses (everywhere that I recall seeing it) average power. But I am guessing that even with my most carefully selected route and attempt to maintain a flat effort, my normalized power in this 20 minute test is probably going to be 10 to 15% higher than my average power. So I am wondering if using NP isn't a better way to establish ftp, particularly since one of my primary interests in this number is for TSS calculations (which will use NP and not average power).
I was interested in other folk's thoughts regarding this.