# Thrombosis risk before launch

I am currently following the live broadcast of today's SpaceX launch. For a few hours already, astronauts are sitting inside the vessel, barely able to move. I wonder what precautions are taken to minimize the risk of a thrombosis. Of course health status of astronauts is closely monitored before and throughout a mission. But even a healthy individual does have a risk for thrombosis when sitting still for a longer duration. Do astronauts take blood thinners or take any other precautions?

• +1 is adrenalin a blood thinner? :-)
– uhoh
May 28 '20 at 2:42
• FWIW, can't recall any such precautions during the Shuttle days. I'm guessin' that, for the first manned Crew Dragon mission, the crews' pressure suits fit pretty good and were comfy. Not necessarily true for Shuttle crews, since said suits were "off the shelf." Jun 29 '20 at 20:25