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    • Bedrest studies

    • What are bedrest studies?
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    • Standing on your own two feet

    ESA > Our Activities > Human Spaceflight > Bedrest studies

    Standing on your own two feet

    Bedrest tilt table

    Recuperating after a long bedrest study is similar to the way people recover from serious illness or how astronauts are helped to regain full muscle and bone structure after being in space.

    After the human body adapts to spending days upside down in bed – it cannot get up and walk as soon as a bedrest study is over.

    Participants are slowly raised back into an upright position and the volunteers are literally massaged back into health over a period of weeks. Further tests are done and participants are followed to make sure that their bodies return to full health.

    Exercise is done slowly but surely with at least one hour each day spent in the gym. Participants often get blisters on their feet and muscle pains because they are no longer used to using them.

    Despite the controlled regime, returning to normal life can be exhausting.

    Aside from the physical adaptation necessary to returning to a vertical world, bedrest volunteers often remark on how they have to adapt psychologically.


    Bedrest volunteer balance test
    Regaining balance

    “Everything seemed to be moving,” writes Dorota in her bedrest diary. “While lying down we kept our heads in the same position all the time – after getting up it seemed like the whole world was moving around!”

    Many participants remark on the exclusion from normal life that they notice only once the study is over. For the duration of the study most decisions are taken on behalf of the volunteers. They do not choose what to eat, they don’t need to pay for anything in the shops, the number of people they see is limited.

    Returning to the real world and its many decisions can be quite overwhelming. Added to that is the sensory deprivation experienced by the participants.

    Bedrest volunteer on treadmill
    Bedrest exercise

    During the course of the study, they will have been inside the whole time. Compared to the centre where the study took place, the sounds and smells experienced outside are more varied and the participants will be more aware of them after the study.

    Complete rehabilitation can take months and the participants are given regular check-ups to make sure that they completely recover.

    Last update: 12 November 2012

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    • Previous bedrest studies
      • Women rising to the challenge of weightlessness
        • Paving the way for women to Mars: the last WISE volunteers back on their feet
          • WISE bed-rest study: second campaign under way
            • Female volunteers prepare for a second 'bedrest'
              • WISE study starts in Toulouse: 60 days of bed-rest for terrestrial female astronauts
                • ESA looking for more European women to volunteer for WISE bed-rest study in Toulouse next year
                  • ESA is looking for female volunteers for a bed-rest study in Toulouse next year
                    • End of the bedrest campaign
                      • Long-term bed rest study: second period 22 March - 27 July 2002
                      • Bedrest diaries
                        • Diaries bed rest study participants
                        • Bedrest studies

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