title: Changes in total body water during spaceflight.
abstract: This experiment represents the first time that it has been possible to measure a body fluid compartment by direct means during spaceflight. Based on the results observed in the five crewmen in this study, it is concluded that TBW decreases by 3.4% after 1 to 3 days of exposure to microgravity in the Space Shuttle. Some individuals appear to undergo this decrease within 24 hours. This effect may be enhanced by decreased water intake due to nausea associated with SMS.
authors.affiliation: Medical Sciences Division, NASA Johnson Space Center, Houston, Texas 77058.
authors.forename: C S
authors.initials: CS
authors.lastname: Leach
authors.forename: L D
authors.initials: LD
authors.lastname: Inners
authors.forename: J B
authors.initials: JB
authors.lastname: Charles
mesh_terms: D000328:Adult; D000704:Analysis of Variance; D001834:Body Water / Q000502:physiology*; D001835:Body Weight / Q000502:physiology; D006801:Humans; D008297:Male; D010103:Oxygen Isotopes; D012463:Saliva / Q000502:physiology; D013026:Space Flight
chemical_list: D010103:Oxygen Isotopes