It doesn't usually hurt to go up stairs, but sometimes it does going down stairs, and even if it doesn't hurt going down stairs, my knees
usually feel kinda weak as I go down--shaky, like they can't support
alot of weight. I run only twice a week, on pavement and on hilly hiking trails, and I use inserts with good running shoes. Every time I think it's getting better, it comes right back. Maybe I should stop running. I would very much appreciate any suggestions you feel might help me.