Yesterday I received an "Unproductive" status on the Training status page on my 935. Feedback to Garmin:
1) Pretty darn impressive considering I'm fighting a cold and had slept like complete crap the previous 2 nights which the Sleep screen in Connect confirmed.
2) How can my Lactate Threshold and my Aerobic training effect both been positive/improving during yesterday's activity while the overall status went into Unproductive?
3) OHR and pace and the run overall felt nothing out of the ordinary which means the data I was provided went against the old school rule of listening to your body and instead used the behind the scenes data. Again, pretty awesome, but also perplexing as one could question if you should listen to your body or listen to your Garmin.
4) I'm going to use my HRM-TRI for my next few runs to see what type of variance I get in my data, but to date I have found the OHR to behave just like my old chest strap, with the exception that it takes 5-10 seconds longer for it to come down from peak values at times, for example when transitioning from an uphill to a downhill.
I very much want to be able to utilize these tools as much as Polar users swear by the data Polar provides, however I'm somewhat confused on how to do so with unintended mixed messages being received. I gladly welcome anyone who can chime in on a more scientific level.