I had the Qsart sweat test. Sounds like you had the full body in a device to make you sweat with the powder. My Qsart showed normal in arm and low in legs and foot. Frankly, I still do not understand it all. Have not seen the doctor, so I’ve only been told I have autonomic neuropathy. I have terrible insomnia, daytime grogginess, sleep apnea and wake up with dreams and recall. I really have been thinking it’s MSA with the tremor and the restless legs. My life the past year has been miserable. Oddly, I had a tilt table test at Mayo in 2008 that showed orthostatic intolerance, but the Qsart and the rest of the tests were fine. I imagine what ever is going on it’s been working on me since then. I like to understand, and these medical problems seem to have few answers if any. Thanks for sharing, I’m 72 so not young onset here (unless you count the 2008 test).