I have the Garmin rugged instinct not the solar watch. I totally understand how intensive minutes are tracked, using heart rate zones and level of days you workout. Two weeks ago, I put up 1250 intensive minutes the week before that it was 0, last week it was 132 after I re-set the device this week it is 0 again. Are other Garmin user experiencing this same problem? I want to know if it is just my rugged instinct or are other Garmin devices having this same issue?