So my average daily vigorous minutes are 27 yet under fitness age all of a sudden it’s showing zero for intensity days? Was working fine up until recently.
Yes, this is the screenshot I attached to my previous post, but as I wrote there, this information was already removed from the Help screen, both on the Android, and on the iOS GCM app. I assume, you still have an older version of the app. The only information still remaining public, is the one shown on the other screenshot of the previous post. It tells you need at least 15 vigorous minutes within a 30 minutes long time period. I guess that's the current way it works.
Is it still continuous?
They only tell 15 vigorous minutes within 30 min time period. I do not know more than that.
Seems like they aren’t taking into account any HIIT exercise then as rest / walk periods will slow your HR down below vigorous.
The type of the activity is irrelevant, the only thing that counts is your HR, and your avg. Resting HR. Alternatively (if you do not use the default IM method), it is the HR, and the HR Zones settings. It does not matter whether you play chess, or do HIIT. As long as your HR is high enough for certain time, you'll get the vigorous minutes.