I have problems with my knees, been told I have osteoarthritis in my knees though it was only diagnosed last year and when I had it diagnosed I wasn't experiencing any pain, infact the scan which showed the issue was regarding another issue.
I was told that the only thing you could do with a joint problem (aside from,-in the words of the consultant- stop running... ??!) is to build up the muscles around the joint and then train your body to use those muscles over your joints. It then helps take some of the strain away from the joints and they then are not so over used and so then when you have down time are more likely to be able to recover from being used.
Apparently its common for runners to get OA in the knees and hips due to running though there are studies which contradict this but safe to say the medical profession- in my experience do not like runners, they seem to view it as an extreme sport. When I was talking to the physios I may as well have been in A&E asking for help because I had a love for jumping in fires and couldn't understand why my face felt sore...