title: Physical Condition Does Not Affect Gravity-Induced Loss of Consciousness during Human Centrifuge Training in Well-Experienced Young Aviators.
abstract: BACKGROUND
  Consensus on whether physical condition affects the risk of gravity-induced loss of consciousness (G-LOC) has not been reached, and most previous studies about the issue did not include well-experienced aviators. We compared the physical conditions of well-experienced young aviators according to the occurrence of G-LOC during human centrifuge training.
  
  
  METHODS
  Among 361 young male aviators on active flight duty with experience in high performance aircrafts for at least 2 years, 350 had full data available and were reviewed in this study. We divided the aviators into the G-LOC group and the non-G-LOC group according to their human centrifuge training results. We then compared their basic characteristics, body composition, physical fitness level, and pulmonary function.
  
  
  RESULTS
  Twenty nine aviators (8.3%) who experienced G-LOC during human centrifuge training in their first trials were classified into the G-LOC group. There was no difference in physical condition of aviators between the two groups.
  
  
  CONCLUSIONS
  Young aviators with experience in G-LOC showed no difference in physical condition such as muscle mass, strength, and general endurance from the aviators with no such experience. Although more studies are needed, physical condition does not seem to be a significant determinant of G-LOC among the experienced aviators.
authors.affiliation: Seoul National University Hospital, 101 Daehak-ro Jongno-gu, Seoul, 110-744, Republic of Korea.
authors.forename: Jinhee
authors.initials: J
authors.lastname: Park
authors.affiliation: Aerospace Medical Center, Republic of Korea Air Force, P.O. Box 18, Song-am-ri, Namil-myeon, Sangdang-gu, Cheongju-si, Chungcheongbuk-do, Republic of Korea.
authors.forename: Chul
authors.initials: C
authors.lastname: Yun
authors.affiliation: Department of Orthopaedic Surgery, Asan Medical Center Children's Hospital, University of Ulsan College of Medicine, 88, Olympic-ro, 43-gil, Songpa-gu, Seoul, 05505, Republic of Korea.
authors.forename: Seungcheol
authors.initials: S
authors.lastname: Kang
mesh_terms: D000328:Adult; D002498:Centrifugation; D003710:Demography; D006112:Gravitation; D006801:Humans; D016015:Logistic Models; D008168:Lung / Q000502:physiology; D008297:Male; D008889:Military Personnel; D010809:Physical Fitness; D012129:Respiratory Function Tests; D012189:Retrospective Studies; D014474:Unconsciousness / Q000503:physiopathology*
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