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FTP Not Updating with Auto-calculation?

Anybody else having this issue? I recently did 1 hour effort at higher average power than current FTP was set, and didn't get a recalculation; I then updated it myself. The very next day, I had a 20 minute effort during a workout that would have again increased it if I multiplied that effort by the 0.95. I don't mind updating myself, but wasn't sure if there's something wrong or what.

0 Czechdude over 4 years ago

uhm, well, I have the feeling the watch recalculates the FTP or lactate threshold only once a month and with enough effort...

0 mcalista over 4 years ago

Garmin's FTP autocalculation is really based on power at lactate threshold (detected with a chest strap), and not on 20 minute or 1 hour power numbers. I'm pretty sure it will update more than once per month, but it needs to have sufficient HR data just below and just above threshold.