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Does Garmin use zwift data to estimate VO2?

My Garmin Vivoactive 4 can estimate my VO2, but to me it seems like it is quite off.
I zwift a lot and all my data from zwift is being registered in my garmin app.

My question is:
Does garmin use zwift data to estimate my VO2? If yes, which metrics does it use?

0 trux over 3 years ago

3044690 said:
Does garmin use zwift data to estimate my VO2?

Only if you record the session with your Garmin watch in the same time and have also a power meter connected to the watch. The calculation off VO₂max happens on the watch, not in Garmin Connect, so any data not being collected by the watch will have no impact on the calculation.

Read more details here: What Is VO2 Max Estimate and How Does It Work?