Last year it came on quickly and would end my runs with total lock up as soon as 1/2 mile into the run. I quit running for a month, then broke my other leg which was another 3 months off running. I've been super consistent with strengthening and stretching (besides when my leg was broken), have done PT, have seen a knee surgeon specialist to confirm I in fact have IT band syndrome. Massage, ice, Ibuprofen. Change of diet to more clean eating. Lots of foam rolling. The time / money / research investment in trying to beat this is stupid.
I don't know what's left at this point. Fortunately I've been "running" pretty consistently for about 5 months now. No speed work, no volume to speak of, but I'm running about 20mpw in prep for my first IM. So my right or broken leg hurts like a bugger the first half of the run then the IT band takes over the 2nd half. Not exactly a picnic. I have not had it lock up since breaking my leg. It gets close at times (like this morning I had to stop about 4 times).
So I'll say it again. Those of you that do this year in and year out with just tiny little niggles and / or no injuries. Be thankful.
I am so frustrated with this I have considered quitting running after this IM. I just hope I can get to the IM in one piece and can actually run the marathon!