I have a nice hilly 50 km loop with just under 1000 m of climbing that I like to use to assess my endurance , I also like to ride it on feel from time to time and guess what my power / heart rate was or to maintain an endurance or tempo pace without looking at the Garmin . Use a couple of hilly segments for similar too .
Thats a good result Martin , I heard Frank Overton from Fascat recently saying : if you’re ove 50 you’re making gains by maintaining your best power or PBS . So ,by getting PBS , you’re really going well 💪