Christopher while in general I agree with your principle of training, train hard, recover, train hard again.

From personal experience of arthritis in the knees it is the opposite result to what you post, although may be it depends on the mileage? No running no good, too much running no good, moderation in all things?????

My Grandfather, had arthritis in his knees all the time I knew him, my father, arthritis in his knees from his 30s, both brothers the same, son 25 already having knee problems and yet none of these did anyrunning, father a little football in his teens and twenties, son rugby in his teens and early 20s. Both brothers no sport. Me, arthritis in my knee at 40, I was told by phyiso do not stop running and do your exercises, did exercises and do even more running now and at 48 I am pain freein my knee.

ATB

Tahr