Intensity minutes

You need to make sure that your resting heart rate is set correctly. There is also the option to have Garmin determine the thresholds for low/high intensity minutes or to define your own heart rate boundaries. Automatic works for me.

I would suggest you first verify that your heart rate zones are correct, including the max HR and lactate threshold.  

If they are correct and you are still not getting intensity minutes when you believe that you should, you can adjust the threshold in Garmin Connect by going in to your watch settings in the phone app, then selecting Activity Tracking -> Weekly Intensity Minutes.  From there, you can change it from “Automatic” to “Heart Rate Zones” and select the zones which you consider appropriate for Moderate and Vigorous Intensity.

And please note: Intensity Minutes do not start to accumulate until after 10 minutes of sustained, continuous activity above the threshold set.  If your heart rate drops below the threshold, even for a second, the 10-minute timer starts again at 0.

HTH

Thank you. Just realized looking at your useful comments that the options are much more limited on the app on the phone that if you log in the computer. 

Thanks. I think that is what probably happened when you are doing “low” moderate activity as I was.