Maybe you already looked into barefoot running. I found it took the impact off my knees.

Oh yeah, haha

I've never done the like barefoot-barefoot thing but switched to minimalist zero-drop shoes.

It was in fact a game-changer for me, all of a sudden in my 30s I could run 10k without IT band pain (even when fairly athletic playing American football in my youth). But when I pushed more into the 10-mile range I got runner's knee - diagnosed w/o MRI or anything as patellar tendinitis although I'm sort of worried it was actually my meniscus.

I kept wanting to get back to it and kept re-aggravating. So I have now mostly given it up for like a year. Bad for my health of course. But as I move forward forced days off (ideally cross-training w/ swimming, kayaking, hitting a heavy bag, etc) just have to be part of the plan.

Have you tried non-running (indoor) cardio as a regular replacement? Jumping jacks, squats, jump squats, mountain climbers, even jogging in place. I do cardio everyday but running is only every 4th day. Of course, if you have access to equipment there’s always stationary bike and other machines like an elliptical.

Yeah, zero-drop shoes is what I mean by "barefoot" running. Landing on the balls of your feet, not your heel.

Maybe 10 miles is too much regardless though.