Hi All. I could not find an answer already posted so hopefully someone can help.
In a recent event, I received the message that my FTP had increased, to 291, I accepted that change. However in Zwiftpower it shows on my profile as 253 @ 73kg.
I followed the calculation of 3 best 20 min FTP over 90 days, by 90%, and I can see that the Zwiftpower number is accurate (accounting also for recent weight loss of 2kg). All these races were @ 75kg.
What I can’t now work out is, why Zwift said my FTP has incrased to 291 (this was after my most recent race at 75kg… and I have subsequently adjusted to 73kg and have had no races at this weight.)
Best I can work out is that the FTP suggested by Zwift is at 100%, but Zwiftpower takes 90%… but even with this I can’t quite get the numbers to line up.