[jmye]

You don’t really need to do anything extra at 50. 50 is a basic baseline for a lot of folks running 3-3:30 marathons. I stretch for about 3 minutes after I run, and little else, for instance, and I’m at 60-70mpw, old, and a bit overweight.

I know very few people at this mileage doing serious “extra” work.

[radar]

Have you ever had runner's knee? I'm dealing with it for the first time at the moment. Looking for a quick fix.

[jmye]

Yes - for me, it was a strength issue. I spent a couple weeks running hills to even things out and it faded relatively quickly.

[1letterunixname]

This isn't the place for medical advice. See an orthopedic surgeon.