title: Changes in mood status and neurotic levels during a 20-day bed rest.
abstract: This study evaluated changes of mood status and depressive and neurotic levels in nine young male subjects during a 20-day 6 degrees head-down tilting bed rest and examined whether exercise training modified these changes. Participants were asked to complete psychometrical inventories on before, during, and after the bed rest experiment. Depressive and neurotic levels were enhanced during bed rest period according to the Japanese version of Zung's Self-rating Depression Scale and the Japanese version of the General Health Questionnaire. Mood state "vigor" was impaired and "confusion" was increased during bed rest and recumbent control periods compared to pre-bed rest and ambulatory control periods according to the Japanese version of Profiles of Mood State, whereas the mood "tension-anxiety", "depression-dejection", "anger-hostility" and "fatigue" were relatively stable during experiment. Isometric exercise training did not modify these results. Microgravity, along with confinement to bed and isolation from familiar environments, induced impairment of mental status.
authors.affiliation: Department of Pediatrics, Kansai Medical University, Moriguchi, Osaka 570-8506, Japan. ishizaki@nisiq.net
authors.forename: Yuko
authors.initials: Y
authors.lastname: Ishizaki
authors.forename: Tatsuro
authors.initials: T
authors.lastname: Ishizaki
authors.forename: Hideoki
authors.initials: H
authors.lastname: Fukuoka
authors.forename: Chang-Sun
authors.initials: CS
authors.lastname: Kim
authors.forename: Masayo
authors.initials: M
authors.lastname: Fujita
authors.forename: Yuko
authors.initials: Y
authors.lastname: Maegawa
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Fujioka
authors.forename: Taisaku
authors.initials: T
authors.lastname: Katsura
authors.forename: Yoji
authors.initials: Y
authors.lastname: Suzuki
authors.forename: Atsuaki
authors.initials: A
authors.lastname: Gunji
mesh_terms: D000223:Adaptation, Psychological; D000293:Adolescent; D000328:Adult; D000339:Affect; D001510:Bed Rest / Q000009:adverse effects; D003863:Depression / Q000209:etiology* / Q000517:prevention & control; D005081:Exercise Therapy / Q000379:methods*; D018475:Head-Down Tilt / Q000009:adverse effects; D006801:Humans; D007564:Japan; D008297:Male; D009497:Neurotic Disorders / Q000209:etiology / Q000517:prevention & control; D013315:Stress, Psychological / Q000209:etiology / Q000517:prevention & control*; D011795:Surveys and Questionnaires; D018474:Weightlessness Simulation / Q000009:adverse effects*