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

Ishizaki, Yuko; Ishizaki, Tatsuro; Fukuoka, Hiroshi; Kim, Changsun; Fujita, Masayo; Maegawa, Yuko; Fujioka, Hiroshi; Katsura, Toshiya; Suzuki, Yoshio; Gunji, Atsuko

doi:10.1016/s0094-5765(01)00189-8

Cited by 47 publications

(61 citation statements)

References 8 publications

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“…However, no previous research using countermeasures based on microgravity-induced changes has clearly and effectively proved to counteract the impaired effects of bed rest on psychological factors. During a 20-day HDT with male participants, exercise training did not modify the increase in impaired mood states and levels of depression provoked by HDT-induced changes (Ishizaki et al, 2002). This is in agreement with another experiment, a 30-day HDT also conducted with male subjects, that showed slight deleterious changes in psychological states which were not improved by exercise training (DeRoshia & Greenleaf, 1993).…”

Section: Discussionsupporting

confidence: 86%

“…The findings of the present study support a previous investigation which has clearly shown the negative effects of a HDT LTBR on a series of psychological states (Ishizaki et al, 1994). Our data further confirm previous experiments that have reported that simulating weightlessness induces psychological stress (Chouke` r et al, 2001; Grigor'ev & Fedorov, 1996;Ishizaki et al, 2002), and show the potential stress of simulated weightlessness even if stress is not inherent in such a situation in particular (Grigor'ev & Fedorov, 1996) or in other extreme situations such as simulated high altitude (Nicolas et al, 1999), or polar expeditions (Palinkas & Suedfeld, 2007;Suedfeld, 1998). Undoubtedly, the critical stage is the standing up period at the beginning of the recovery ambulatory phase during which the more prevalent increases were noticed.…”

supporting

confidence: 93%

“…During LTBR, people have to face environmental changes which might involve possible adverse effects including the development of stress responses (Gushin, 1995), and side effects ranging from a failure to recover to burnout and pathological disorders. It seems that simulating weightlessness induces psychological stress (Chouke` r et al, 2001; Grigor'ev & Fedorov 1996;Ishizaki et al, 2002). On the other hand, studies of such analogue environments have shown processes linked to adaptation to environmental constraints (Kanas & Manzey, 2003;Ritsher, Kanas, Ihle, & Saylor, 2007).…”

Section: Introductionmentioning

confidence: 99%

“…Even if several studies have found that physical exercise reduced psychological stress in gravitational situations (Nabkasorn et al, 2006; Otto,1990;Salmon, 2001), other studies in simulated microgravity found more controversial results. For instance, a bed rest study (Ishizaki et al, 2002) showed that some negative changes related to mood states appeared during a 20-day head-down tilt bed rest (HDT), and these adverse effects were not compensated by isometric exercise training. In another bed rest study (DeRoshia & Greenleaf, 1993), few deleterious changes in performance and mood occurred among the participants compared to baseline ambulatory levels.…”

mentioning

confidence: 99%

“…It seems that simulating weightlessness induces psychological stress (Chouke` r et al, 2001;Grigor'ev & Fedorov 1996;Ishizaki et al, 2002). On the other hand, studies of such analogue environments have shown processes linked to adaptation to environmental constraints (Kanas & Manzey, 2003;Ritsher, Kanas, Ihle, & Saylor, 2007).…”

mentioning

confidence: 99%

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Stress and recovery assessment during simulated microgravity: Effects of exercise during a long-term head-down tilt bed rest in women

Marilleau

Weiss

2009

Journal of Environmental Psychology

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. Stress and recovery assessment during simulated microgravity: Effects of exercise during a long-term head down tilt bed rest in women.. Journal of Environmental Psychology, Elsevier, 2009, pp.522-528. Stress and recovery assessment during simulated microgravity: Effects of exercise during a long-term head-down tilt bed rest in women Michel Nicolas, Karine Weiss AbstractThe aim of this study was to determine the effects of a 60-day head-down tilt long-term bed rest (HDT) on stress and recovery in sixteen healthy female volunteers. Participants were randomly assigned to either an exercise group (Exe) that followed a training program combining resistive and aerobic exercises, or to a no-exercise control group (Ctl). Psychological states were assessed using the Rest-Q, a validated questionnaire based on stress-recovery responses. A longitudinal analysis revealed significant changes in the general and specific-stress scales for all participants throughout the experiment with a critical stage from supine to standing posture leading to a significant decrease in physical recovery. During HDT, Exe reported higher scores on stress subscales, as well as lower recovery scores compared to the Ctl. During the post-HDT ambulatory recovery period, the exercisers still reported higher scores than the non-exercisers on the Lack of energy stressrelated scale, along with lower scores in general wellbeing and personal accomplishment. The present findings show that simulated weightlessness such as HDT may induce psychological stress and lead to subsequent alterations in perceived recovery. Exercise did not reduce HDT impaired effects on stress and recovery states. Several suggestions, including psychological preparation, are proposed to support the beneficial effects of exercise on psychological factors. Keywords:Bed rest ; Exercise countermeasures ; Recovery ; Space simulation ; Stress Manned spaceflights can be defined as an extreme environment because of the high level of constraints linked to numerous unfamiliar conditions including microgravity, monotony, lack of comfort, boredom, confinement and isolation (Kanas & Manzey, 2003;Suedfeld, 2005). Most of these constraints are present in space simulation experiments such as long-term bed rest (LTBR) which can also be considered as an extreme environment. LTBR not only constitutes a validated physiological model of spaceflights (e.g. Lathers & Charles, 1994;Louisy, Berry, Marini, Guell, & Guezennec, 1995;Sonnenfeld et al., 2007), but also provides good psychological analogues (Weiss & Moser, 1998). LTBR is typified by ''deprivation including the lack of customary amenities, isolation from the home community, confinement with a relatively small number of other people, lack of privacy, difficult and demanding tasks, limited opportunities for communication, and a degree of dependence on outsiders' ' (Harrison, 2005). Previous investigations have shown that simulated microgravity, along with immobilization in bed, accompanied by environmental constraints, induced ...

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Section: Discussionsupporting

confidence: 86%

supporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Stress and recovery assessment during simulated microgravity: Effects of exercise during a long-term head-down tilt bed rest in women

Marilleau

Weiss

2009

Journal of Environmental Psychology

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Stress and Recovery Responses during a 105‐day Ground‐based Space Simulation

Marilleau

Gushin

2014

Stress and Health

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The present study analysed the time course of the psychological process of stress and recovery in six healthy male volunteers during the Mars 105 experimentation, a 105-day ground-based space analogue. The multidimensional assessment of stress and recovery responses showed that stress levels decreased significantly throughout the 105-day isolated and confined extreme (ICE) experiment, especially on its social dimension. In line with previous studies, Fatigue showed a global and progressive reduction. The present results suggest that ICE exposure may not systematically induce stress overload and impaired psychological states. To optimize adaptation to ICE conditions, further improvements in positive psychological effects may be possible by improving the countermeasures, as well as the screening and selection of participants, in order to enhance coping capacities and to improve the balance of recovery-stress states.

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