I bought a 645M 3 months ago and it has shown my training status as "unproductive" over most of that time, including almost 100% of the past month.
My VO2 Max calculation is at 43, but has been as high as 45.
I run trails, so my actual run time varies a lot over different terrain, but I believe I am slightly faster and my flat-course time is faster (but still pretty slow) and my runs are getting longer.
I typically run 3 times a week, training effect is around for an 4 aerobic training effect 5 mile group run, around 3.25 for a slow flat 8 mile long run, and upper 2's for a 5 mile easy recovery run.
Training load is 'optimal'.
I have a smart scale that updates my weight in Garmin's system, have been dropping weight (5lbs a month), and I know that is part of the VO2 max formula. Could that be throwing it off? I'd expect weight loss to raise my VO2 max, all else being equal. Is it possible my physical fitness really is getting worse, and I am only running better because of the weight loss?
The weather changed from cool to hot, I know I'd be a lot faster if I had the May weather again - could that be it?
Very frustrating to pay for advance run dynamics only to have it tell you that you are unproductive no matter what you do.