So when you have chronic ITBS, my first thought is that you might need orthotics. If you have a forefoot dysfunction, then the ITB is going to be doing more deceleration than it ought to. So my advice is to get evaluated for custom orthotic therapy.
Second, you need to spend time building your gluteal muscles up before you engage in plyometrics for example. We should look at what you are actually doing in this regard.
Third, you should be using the stick or a foam roller on your ITB and you should be stretching regularly to keep the ITB soft and elastic.
If you are local, you might make an appointment to see what is actually occurring. Who is zooming who as I like to say. Basically, you need a good functional assessment so that we can get to the bottom of the issue, that would be your best shot. I will blog about this common injury soon at my blog http://www.srcpt.com/blog