My Vivosmart has been calculating my intensity minutes over the last 2 weeks, very differently than when I purchased it 7 months ago. I worked out on the elliptical last night for just over 55 minutes. It showed that my average heart beat was 143 bpm. However when I looked at the intensity minutes, it indicated 50 minutes of moderate activity and only 5 minutes of vigorous activity. I have not been doing anything differently in these past two weeks, so I am wondering why the intensity calculations are so drastically different.
