Versa not logging active minutes after a treadmill run.

[iChadman]

I am new to Fitbit with a Versa and a subscription to Fitbit Coach- I am really enjoying them both, and I am a happy customer. However...

I take completing my goals seriously every day. I had 0 active minutes for the day (accurate) so I came back to my hotel and did a 19 minute run on the treadmill. Upon completion I had steps logged, calories burned but zero minutes of activity 😞

I then did a fifteen minute walk outside and that DID Log active mintues. I am really confused by this since when I do the strength training workout in Fitbit Coach, it does log active minutes, 

What at is the algorithm for logging active minutes? This makes no logical sense. I know you have to have an elevated heart rate for 10 consecutive minutes or longer. I did that on the treadmill. Anyone have insight?

Thank you,

Moderator Edit: Clarified Subject.

[MarcoGFitbit]

Hello @iChadman, I hope you're doing well, it's nice to see you around. 

Thanks for bringing this to my attention. Please note that your watch is the one who tracks your active minutes and these don't depend on Fitbit Coach. Keep in mind that our algorithms detect subtle differences in exertion that may explain why two seemingly identical activities like walking on a treadmill vs. walking outside result in different active minute totals. For example if you took a brisk walk along the same route two days in a row, differences in your speed and exertion levels (e.g. out of breath vs not out of breath, etc) will cause different active minute totals for the two activities. Also remember that active minutes are only recorded for activities that last 10 minutes or longer.  

Because our trackers primarily track movement through the use of an accelerometer, they more accurately detect active minutes for step-based activities (brisk walking, running) than non-step based activities or activities that require more than steps (yoga, tennis). Trackers with a heart rate monitor detect active minutes most accurately, since heart rate data allows us to better estimate caloric burn and, in turn, exercise intensity but active minutes do not depend entirely on it (trackers like the Flex, Flex 2 and Alta that don't have a heart rate monitor also count active minutes). If you're unhappy with your active minutes total, we recommend logging the activity manually  Manually logged activities override your tracker's data. Sometimes customers report a decrease in active minutes after logging an activity, which can occur if what your tracker recorded was more intense than what you logged. 

I hope this can be helpful, if there's anything else I can do for you, please feel free to reply.