提高人体血液重新分布适应性训练方法的研究

A Study on Training Method for Increasing Adaptability to Blood Redistribution in Human.

目的检验反复体位改变训练在提高人体对血液重新分布适应性方面的有效性 ,寻找可行的训练方法。方法 1 2名被试者随机分为A、B两组 ,每组 6人 ,分别接受 1 1d共 9次的A模式和B模式 (头低位、头高位快速交替 )的反复体位改变训练。训练前、后进行头低位 (HDT - 30°/30min)耐力检查和立位耐力检查 ,以评价训练效果。结果 1 ) 2种模式的反复体位改变训练均提高了被试者的HDT耐力 ;与训练前相比 ,训练后在HDT耐力检查中 ,B组的症状得分明显小于A组 (P <0 .0 5 ) ,B组心率降幅明显增加 (P <0 .0 1 ) ,说明B模式的训练在提高HDT耐力方面的效果较好 ;2 )两种模式的反复体位改变训练均使被试者的立位耐力有一定程度的改善 ;与训练前相比 ,训练后在立位耐力检查中 ,B组平均动脉压增幅明显增加 (P <0 .0 5 ) ,心率的增幅呈现小于A组的趋势 (P <0 .1 0 ) ,说明B模式的训练在提高立位耐力方面的效果略好。结论反复体位改变训练可提高人体对血液重新分布的适应性 ;B模式是相对较好的训练方法 ,有望在航天员血液重新分布适应训练中得到应用。

Objective To verify validity of the increase in adaptability of blood redistribution in human body with repeated body position change training and to find preferable training method for increasing astronaut′s adaptability of blood redistribution. Method Twelve subjects were randomly divided into group A and B. Six subjects in each group were trained with mode A and B repeated position change (9 times in 11 d) respectively. Their head-down tilt (HDT -30°/30 min) tolerance and orthostatic tolerance were determined before and after training to verify training effects. Result 1) Two kinds of repeated body position change training modes increased all subjects′ HDT tolerance. Compared with pre-training, during HDT test subjects′ symptom scores in group B were significantly lower than those in group A (P<0.05) and after training decreasing magnitude of heart rate in group B increased significantly (P<0.01). Then mode B to be preferable training method in increasing HDT tolerance was suggested. 2) Two kinds of training modes improved all subjects' orthostatic tolerance. Compared with pre-training, during orthostatic tolerance test increasing magnitude of mean arterial blood pressure in group B increased significantly (P<0.05) and a trend of increasing magnitude of heart rate in group B was appeared smaller than in group A (P<0.10). Mode B to be preferable training method in increasing orthostatic tolerance was suggested too. Conclusion Repeated body position change training could increase adaptability to blood redistribution in human body. Mode B was preferable training method and would be hopeful to be used in astronaut training.