Sounds impressive.It made me feel relaxed and after sleeping in 1% atmosphere I felt like my bones were growing or getting denser, it was a weird feeling.
Circulation improved and I was unable to get dizzy by hyperventilating.
I didn't have any health issues which I wanted to cure, I was just playing around with it.
Whenever I use Frolov device for 15 minutes, 2.5 hours after meal and just before sleep, I sleep very well.