[continued]
By October 2002 I'd got up to occasionally an hour running, and maybe a couple of shorter runs (some treadmill, some not) a week before the ITBS started to come back (reverting to the right knee). BUT it was very mild, and I could still run through it without much discomfort. But after two previous rehab periods, I had to get it sorted. I was a bit more clued up about ITBS by now and went to get my gait analysed at a proper running shop (Advance Performance in Peterborough). The video showed that I overpronate enormously and have fallen arches - my foot kind-of collapsed inwards, causing my knee to move inwards and twist, rubbing the ITB. They sorted me for some shoes, and immediately the ITB symptoms became less and less significant. I went to a physio too, and she gave me exercises to do, but as a final try to clear up the last of the pain tried some cut-up paper (yellow pages) and duct tape under my insoles from big toe to arch region (i.e. inside edge of the shoe), and after a bit of adjustment by me, the aggravation went dramatically and instantly.
Since then I've tried to build my mileage sensibly, but feel like I could run forever, so tend to do more than maybe I should. I now run four times a week. One long run on a Saturday which is currently 10 or 13 miles, probably a six-miler, a brisk 4-miler and a club session.
Finally, just to illustrate the main point of my crusade, I did a 1 hour cricket practice recently, but took my old running shoes for reasons too dull to go into, thinking it'd be OK, as it was only cricket, and only one night. Guess what happened? The old feeling of mild ITB pain in that scarred old right knee.
My gait is so different in my new shoes - looking in the mirror at the gym or even just feeling it whilst running, there's no collapse of the knee, and as far as I can see, no twanging of the ITB, so no pain. I remain very, very sensitive to anything happening in my knees, and I'm touching wood right now, but it's my firm belief that I've got past ITBS by eliminating the irritation, and that the strengthening and stretching (I DO still stretch) is important but very much secondary. I still have ITBs like steel bands!
Hope that helps, but do please ask me if you have any other questions. But bear in mind that my experience doesn't necessarily match up with those of other people! Best of luck to all of you with ITBS - there's a LOT of us out there, many of whom just give up their beloved sport.