摘要
失重使航天员立位试验的适应能力降低，为提高人体的立位耐力，设计了反复的体位变换训练法，观察其对立位耐力的影响。受试者年龄为１９～２０岁的健康男性自愿者，分成Ａ组（５人）和Ｂ组（４人）。Ａ组每天进行２ｈ的体育训练，中等运动量，持续６周，同时进行反复的体位变换训练，每次２５～３０ｍｉｎ，每周４次，共２３次，Ｂ组则只进行体育训练。训练前后两组都进行立位试验。结果表明，只进行体育训练的Ｂ组的立位耐力没有明显的变化（Ｐ＞０．０５），而反复体位变换训练的Ａ组的立位耐力，有明显的提高（Ｐ＜０．０５）。训练后站立中Ａ组心血管系统的调节能力优于Ｂ组，很可能是由於反复的体位变换提高了心血管系统的反射性调节能力，从而提高了人体的立位耐力。
Weightlessness decreases astronaut's orthostatic tolerance. A training method for increasing orthostatic tolerance was designed and its effects were studied. Nine healthy male volunteers aged 19～20 were selected as the test subjects. They were divided into two groups: group A(5men) received both physical training (physical exercise 2h/ day for 6 weeks) and body position change training (head-down and head-up tilts, 4 serieses a week for 6 weeks), while group B (4men) received physical training only. Before and after training, orthostatic tolerance tests were made in the two groups.The results indicated that the orthostatic tolerance was not changed in group B (P>0.05),while the orthostatic tolerance was enhanced significantly in group A (P<0.05). During standing in head-up position after training, regulating ability of cardiovascular system in group A was better than that in group B. It is possible that training of body position change enhanced reflex regulating ability of the cardiovascular system and thus improved the adaptability to orthostasis.
出处
《航天医学与医学工程》
CAS
CSCD
1996年第3期167-172,共6页
Space Medicine & Medical Engineering
关键词
航天员训练
立位耐力
心血管系统
体位
astronaut training orthostatic tolerance cardiovascular system body fluid shift body position physical exercise
