In the present study, based on the hypothesis that the factors that make it difficult for astronauts to walk immediately after their return from orbit and before re-adaptation to the ground are the unevenness in the state of the lower limb antagonistic muscles, which adapted to the long-term space stay, and the somatosensory regulation in the vestibular system and cerebellum, investigators aim to study astronauts who have stayed in space for a long time, observing them to learn about the process, including (1) co-contraction of the lower limb antagonist muscles, (2) lower limb skeletal muscle blood flow, and (3) center of gravity regulated by the somatosensory system are re-adapted to land, and acquire basic data regarding the re-adaptation process immediately after return.
Mission | Launch/Start Date | Landing/End Date | Duration |
---|---|---|---|
Expedition 41 | 09/10/2014 | 11/09/2014 | 29 days |
Expedition 42 | 11/10/2014 | 03/11/2015 | 121 days |
Expedition 43 | 03/11/2015 | 06/10/2015 | 91 days |
Expedition 44 | 06/10/2015 | 09/11/2015 | 93 days |
Expedition 45 | 09/11/2015 | 12/11/2015 | 91 days |
Expedition 46 | 12/11/2015 | 03/02/2016 | 82 days |
Expedition 47 | 03/02/2016 | 06/18/2016 | 108 days |
Expedition 48 | 06/18/2016 | 09/06/2016 | 80 days |
Expedition 49 | 09/06/2016 | 10/30/2016 | 54 days |