Cori --- A Piece to the Puzzle

I have an answer to the ever illusive, "Why do my IT Bands hurt some days for no real reason?" question.
This was frustrating me because it doesn't matter how much I stretch, or how far we run, or even how hilly/flat the run is.
The one thing I had noticed is that the better hydrated I am, the less likely it is to happen.
Tonight I figured it out. It's the humidity.
When the weather is humid, my legs swell just a tad, but it's enough to aggravate those ITBs.
This is good news. I don't think Chicago will be too humid in October.
But bad news for training in Kansas during July and August.
Hmmm.
Good times, this training.......good times.