He Xiaohan, Lei Yu, Xu Zi, Li Kai, Nicolas Michel, Wu Ruilin, Li Yinghui
Aerosp Med Hum Perform. 2025 Apr;96(4):304-313. doi: 10.3357/AMHP.6567.2025.
The present study aimed to investigate changes in risky behavior in a sample of 36 healthy men during a 90-d head-down bed rest (HDBR) experiment and examined whether psychological factors-general self-efficacy, stress, and recovery-could influence these changes.
Subjects completed the Balloon Analog Risk Task (BART) and two psychological scales once during the acclimation period, six times during the HDBR period, and twice during the recovery period. During the HDBR period, subjects were required to maintain a -6° head-down position for most daily activities and only permitted to change positions around the longitudinal axis of their bodies.
The results demonstrated that subjects' risk-taking behaviors were significantly affected by bed rest, with an increased propensity to engage in risky activities during the head-down stage. In addition, BART scores did not return to baseline when subjects entered the recovery stage. In terms of psychological variables, the results indicated that scores of general self-efficacy and recovery were negatively correlated with BART indicators, while stress levels were positively correlated with risky behaviors. Compared to other psychological variables, the perceived physical stress, including fatigue, somatic complaints, and sleep quality, exhibited the strongest correlations with BART indicators.
The findings of this study implied that prolonged exposure to a simulated microgravity environment and confined isolation conditions may have a sustained impact on risk-taking tendencies, with changes in risky behaviors in the head-down state more closely associated with physiological symptoms. He X, Lei Y, Xu Z, Li K, Nicolas M, Wu R, Li Y. Changes in risky behavior in long-term head-down bed rest and relation to psychological status. Aerosp Med Hum Perform. 2025; 96(4):304-313.
本研究旨在调查36名健康男性在为期90天的头低位卧床休息（HDBR）实验中的风险行为变化，并研究心理因素——一般自我效能感、压力和恢复能力——是否会影响这些变化。
受试者在适应期完成一次气球模拟风险任务（BART）和两项心理量表，在HDBR期间完成六次，在恢复期完成两次。在HDBR期间，受试者在大多数日常活动中需保持-6°头低位，仅允许围绕身体纵轴改变姿势。
结果表明，卧床休息显著影响了受试者的冒险行为，在头低位阶段从事冒险活动的倾向增加。此外，当受试者进入恢复期时，BART分数并未恢复到基线水平。在心理变量方面，结果表明一般自我效能感和恢复能力得分与BART指标呈负相关，而压力水平与冒险行为呈正相关。与其他心理变量相比，包括疲劳、躯体不适和睡眠质量在内的感知身体压力与BART指标的相关性最强。
本研究结果表明，长期暴露于模拟微重力环境和受限隔离条件下可能会对冒险倾向产生持续影响，头低位状态下的风险行为变化与生理症状的关联更为密切。何X，雷Y，徐Z，李K，尼古拉斯M，吴R，李Y。长期头低位卧床休息时风险行为的变化及其与心理状态的关系。航空航天医学与人类表现。2025；96(4):304 - 313。
