HOWEVER if following such a period of adaption you suddenly reduce the g to less than one the body kicks in at once and drops the blood pressure off a cliff.
What sort of length would the period of adaptation be?
I'm intrigued because last year I had a blackout doing aerobatics, without any of the usual grey-out symptoms. The interesting thing was that I recall coming back to one-G level flight before the lights went out. Now this was at the end of a loop in a Yak-52, so there was no way the time period was as long as the 20s you mentioned. At the time I wrote it off to a general lack of fitness and practice.