Stryd power FTP differnence between stryd center and intervals

[Camcam]

Hello everyone i just started using a stryd to run, stryd poer center gave me an FTP of 150w and intervals ICU 62w on the same run, it’s a treadmill run, any idea where the difference came from ? Thanks

[PleasantRidge]

I’ve been using a Stryd for about a year, and still don’t understand their formula for CP. Intervals.icu figures ftp based on a effort of at least 3 mins, with some kind of voodoo using known power curves and chicken heads , which seems to be as accurate as any ftp test I’ve done.

It took a few weeks of runs, but my numbers are very close now. Stryd has me at 275, and intervals has me at 278. Your numbers will probably do the same after some more runs.

[david]

The power for your run has been clipped because Intervals.icu thinks the power is too high based on your FTP (50):

I changed your FTP to 150w, did Actions → Reanalyze and now Intervals.icu estimates your FTP to be 148w so close to Stryd:

The power clipping is very useful for cycling where a lot of people have PMs that misbehave when running out of batteries and so on.

[Camcam]

Thanks a lot !

[david]

@PleasantRidge

with some kind of voodoo using known power curves and chicken heads

Thats good Have to get it in the marketing material somehow