I was just googling a bit and found this on the uses of compression garments in athletics - apparently they speed recovery as well as helping during performance. Interesting! There was much more about this on the net but I haven't had a look yet. I had been looking for info on whether compression garments could be considered a therapy for orthostatic intolerance (i.e. something that would improve the underlying condition over time) rather than just a crutch (though a welcome one) and found that instead. I'm sure the answers are out there somewhere!