The Bateman Horne Center has posted about research using the NASA 10-minute lean test: https://batemanhornecenter.org/nasa-10-minute-lean-test-2/ Here's a quote from the web page: And here's the video from that page: I have not watched the whole thing but it looks interesting. I do wonder about false negatives, though. Are there patients who would be found to have OI on a tilt table test who would pass this kind of test? But the passive standing (leaning against wall) does look better than the simple standing test that was advised years ago. Any thoughts from the folks who can read/understand medical details better than I can?