Seventies science-fiction or science experiment? Not an actor or space traveller, this ‘pillownaut’ might not have his feet on firm ground, but he is simulating spaceflight by spending three weeks in bed.
Our bodies adapt to long periods spent lying in bed at 6° below the horizontal as if they were flying in weightlessness. Muscles and bones waste away and when a mission or bedrest campaign ends, the body needs many days to return to form. Studying this process on bedrest volunteers is a lot cheaper and easier than collecting information on astronauts.