NASA notes sex differences in tendency to dysautonomia

[WillowJ]

http://www.nasa.gov/content/men-women-spaceflight-adaptation/index.html

• Orthostatic Intolerance, or the inability to stand without fainting for protracted periods, is more prevalent upon landing in female astronauts than in their male counterparts. One possible reason for this observed difference in orthostatic intolerance between the sexes is reduced leg vascular compliance, which was demonstrated in bed-rest studies – which is a ground analog for spaceflight.
  
  
• Women have greater loss of blood plasma volume than men during spaceflight, and women’s stress response characteristically includes a heart rate increase while men respond with an increase in vascular resistance. Still, these Earth observations require further study in space.

 

[Sidereal]

Good thread on the topic of OI in astronauts & similarities with ME/CFS (including herpes virus reactivation):

http://forums.phoenixrising.me/inde...between-me-cfs-patients-and-astronauts.20141/

 

[alex3619]

I wonder if this might lead to an implication that men with ME possibly have more NMH and women more POTS, at least in proportion.