I get ridiculous summary messages such as unproductive, over reaching and peaking from the Garmin 830 post ride.
I find them amusing. Why look? They arrive after the save button is pushed and I am waiting to shut the Garmin off. And there is no Garmin post ride analysis unless one is wearing a heart rate strap, even if, one has power and power zones set in the Garmin and Garmin Connect.
I use Garmin Connect. In the Garmin iPhone App, there is a better discussion and visual presentation of the summary workout. I was at the track on Tuesday for a structured workout and got a Maintaining. In Garmin Connect, it said sufficient duration and low intensity to improve my aerobic base. Really? Impacted and improved aerobic base 3.3 (green) Maintaining Anaerobic base 2.7 (blue). What was the workout? Warmup, accelerating kilo, 2xflying 500 meters and 2xflying kilos and then 8 laps behind the motor at 29 mph.
3 hours to do that workout so there was a lot of full recovery between efforts and not much riding.
I find the rules based software / AI Apps to be worthless for the training that I do to achieve my goals. I use a coach who provides workouts and I see him one or two times a week at the velodrome where he supervises training of his athletes in a structured session.
With respect to PRs, be careful if you are hitting PRs and feel amazing. The reason is that big efforts, that feel easy, still generate a lot of fatigue.
Training to achieve a goal requires measured efforts with associated rest and recovery over longer periods of time.
I find it is okay to feel great after a workout. I do not have to feel like road kill to achieve a long term goal.