For 4 days, Garmin tells me my training is unproductive. Then, in the next two days, I smash all of my PRs and it says I am Peaking. Sort of like economists looking in the rear view mirror.
I cannot see any utility in anything Garmin feeds me WRT training.
It used to tell me my VO2 Max was 73 ml/kg. Pretty damned impossible for a 64 year old, especially since back of the envelope puts it down around 50.
Use TP or GC. Exert had problems, not sure if they got fixed.....very user friendly though