title: Human adaptation to simulated gravitational fields.
abstract: We present the results of manned studies in which test subjects were exposed to simulated zero g (water immersion or head-down tilt at -6 degrees) and head-to-feet acceleration. The findings give evidence that humans have different individual tolerances to an acceleration of +3 Gz after exposure to zero g, whether simulated by immersion or by head-down tilt. The paper discusses the functional relationship between water balance and cardiac output in the establishment of adaptive reactions to simulated zero g.
authors.affiliation: Institute of Biomedical Problems, Moscow, USSR.
authors.forename: E B
authors.initials: EB
authors.lastname: Shulzhenko
authors.forename: I F
authors.initials: IF
authors.lastname: Vil-Vilyams
authors.forename: V E
authors.initials: VE
authors.lastname: Panfilov
mesh_terms: D000222:Adaptation, Physiological; D000328:Adult; D000337:Aerospace Medicine; D001794:Blood Pressure; D002302:Cardiac Output; D002498:Centrifugation; D018475:Head-Down Tilt; D006339:Heart Rate; D006439:Hemodynamics / Q000502:physiology*; D006801:Humans; D018471:Hypergravity; D007101:Immersion; D008297:Male; D014867:Water; D014882:Water-Electrolyte Balance; D018474:Weightlessness Simulation
chemical_list: D014867:Water