Bedrest studies involve lying in bed at an inclination of 6° so that your head is lower than your body – at least one shoulder must touch the bed at all times. Similar to bedridden people on Earth, astronauts in space suffer as their bones and muscles lose strength from underuse. More particularly we are interested
in the cardiac
deconditioning seen in astronauts and in the present case in healthy volunteers participating to those microgravity simulation studies.