20 mile days -- I was doing 20+ mile days up through last spring -- I'd like to get back to that unless it is clear it will harm me. I did 12 miles and several thousand feet this afternoon (Ed Levin park, up over Monument Peak, over to Mission Peak, and back the way I came -- want to try to not embarrass myself on our Coe trip). Good start, but I sure wish I could again do twice that in a full day, and it is clear that I'm not currently up to that.
Supplements -- I already take fish oil for the omega stuff and glucosamine/chondroitin for joints regularly (daily). Don't know whether it helps, but it seems to so I keep with it. I'll look into your other suggestions.
Second opinion -- due to circumstances, I already do have a second opinion.
Activity -- Dr and I need to talk more about it. His basic thought seems to be that he is not wild about weight-bearing activity on the joint. That affects gym workouts as well as hiking. As with the 20-mile days, I need to undertand what feelings I'll have, what is actually harmful, etc.