Possible eFTP bug

Bug Reports
1

Hi David:

Apologies for interrupting your interesting work on MAP, but:

On my /Activities/Tuesday 9 June 2020, my eFTP is reported as 206w. This number is repeated on /Activities/Activity Power. [And Activity Heart Rate]. It’s also the number of my /Fitness graphs.

But in /Power, my eFTP is reported for this season as 213.

Is there a reason for this difference? Or have I missed something somewhere? Or even – God forbid – there is a bug? You understand that – at these paltry numbers – a 3.5 per cent difference in FTP matters!

Thanks - Michael

2

:slight_smile: The /power page eFTP number is the best for the selected power curve(s), so best for 42d, best for the season etc… It also changes depending on which algorithm is selected. The eFTP number on activity is a running estimate using “FFT curves and Morton 3P” that goes up when you do a new max effort and decays slowly if you reduce training load.

The /power page is useful to get a “personal” number for eFTP and W’ but you need to use Morton 3P and give it the correct inputs or you will get junk. The default algorithm “FFT curves + Mortons 3P” is much more resilient.