Yu X J, Yang T D
Institute of Space Medico-Engineering, Beijing, China.
Space Med Med Eng (Beijing). 2000 Oct;13(5):382-5.
Comparisons of headward fluid shifts, plasma volume losses, altered vasodilator and vasoconstrictor responses, reduced exercise capacities, etc. between microgravity and head-down tilt (HDT) bedrest suggested that HDT model was suitable for simulating thermoregulation under microgravity. Both microgravity and simulated microgravity by HDT exposures degraded human thermoregulation ability in some aspects. The features of the responses to heat stress on men after HDT exposures were higher increase rate in rectal temperature, attenuated increase rates of skin temperature and body heat conductance, less heat dissipation from core to skin and higher sensitivity of sweating etc.
微重力与头低位倾斜（HDT）卧床休息之间在向头侧体液转移、血浆量损失、血管舒张和血管收缩反应改变、运动能力降低等方面的比较表明，HDT模型适用于模拟微重力条件下的体温调节。微重力和HDT暴露模拟的微重力在某些方面都会降低人体的体温调节能力。HDT暴露后男性对热应激反应的特征包括直肠温度升高率更高、皮肤温度和身体热传导增加率减弱、从核心到皮肤的散热减少以及出汗敏感性更高等。
