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It depends on your heart rate. Tap the Zone minutes circle on phone app to see the cutoff heart rate. You could be exercising right near the cutoff heart rate. Some days same workout your heart rate might be a bit higher, say if you got less sleep or if it is hotter; some days your workout just feels a bit easier. Zone minutes isn't really a totally precise measurement, just a guideline.
Before posting, re-read to see if it would make sense to someone else not looking at your Fitbit or phone.
Check if your Fitbit is tracking heart rate correctly. I have often noticed if I wear the sense 2 a bit lose, the heart rate tracking is highly incorrect. Make sure it is tight so the tracking of heart rate is better. If your heart rate is less, there would be very less active zone minutes and it would track as less exercise and you may get a different readiness score (in case you use the premium). Do not worry more on the active zone minutes as Johny Row mentioned, its more of a guidance but a very useful one I must say.
I guess the reason I question it is because if I'm supposed to get 150 active zone minutes a month but it doesn't register the same I'm getting screwed. No biggie I guess as long as I'm getting exercise. Thanks for the help.
@FitterD Fitbit's active zone minutes correspond closely to the CDC Target Heart Rate zones for physical activity. The CDC Activity Recommendations recommend 150 minutes of moderate activity, or 75 minutes of vigorous activity or a combination of the two per week, not per month.
Laurie | Maryland Sense 2, Luxe, Aria 2 | iOS | Mac OS
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