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intensity minutes discrepancy issue

I'm experiencing an issue on Garmin Connect (latest Beta) with intensity minutes where virtually the identical indoor cycling workouts using Zwift show vastly different intensity minutes.

For the workout from a few days ago Garmin Connect calculated 48 intensity minutes, and today I completed the same workout which Garmin Connect calculated 8 minutes.

The stats from both workouts were virtually identical, and both workouts weer uploaded directly from Zwift to Garmin Connect. The activity tracking was set to auto for both workouts.

Anyone have any idea why there is such a large discrepancy between both workouts. Thanks in advance.

Max

0 trux over 1 year ago

Intensity Minutes are not calculated by Zwift, and also not by the Garmin Connect app. They are processed by the watch, so you have to look at the all-day HR graph (not the one in the activity!), and compare it to your 7d avg Resting HR valid on the concerned day. You get IMs for the time where your HR is approx 150% of the Resting HR. Additionally, on some watch models, you have to stay above that threshold for more than 10 minutes continuously. Shorter periods are discarded on those watches.

How Are Intensity Minutes Earned? | Garmin Customer Support

0 CityGuy over 1 year ago in reply to trux

Hi Trux,

Thanks for the info, I'm a new Gamin user and lots to learn.