Changes in mood status and neurotic levels during a 20-day bed rest

Yuko Ishizaki*, Tatsuro Ishizaki, Hideoki Fukuoka, Chang Sun Kim, Masayo Fujita, Yuko Maegawa, Hiroshi Fujioka, Taisaku Katsura, Yoji Suzuki, Atsuaki Gunji

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

48 Citations (Scopus)


This study evaluated changes of mood status and depressive and neurotic levels in nine young male subjects during a 20-day 6° 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.

Original languageEnglish
Pages (from-to)453-459
Number of pages7
JournalActa Astronautica
Issue number7
Publication statusPublished - 2002 Apr
Externally publishedYes

ASJC Scopus subject areas

  • Aerospace Engineering


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