The "Medes", Private Clinic Of Space Medicine In Toulouse, France On December 18, 2001.

FRANCE - DECEMBER 18: The "Medes", private clinic of space medicine In Toulouse, France On December 18, 2001 - First group of seven volunteers (out of 14) give their account of the bedrest" experiment which consisted in staying in an horizontal position for an extended period of time and in studying the impact of prolonged bed rest on the human body; and they have taken part in it from September to December as part of studies on future long manned space flights. The experiment consisted in staying in an horizontal position for an extended period of time and study the impact of prolonged bed rest on the human body. (Photo by Gilles BOUQUILLON/Gamma-Rapho via Getty Images)