反复体位改变训练可提高人体头低位耐力

发布时间：2018-06-25 04:00

本文选题：反复体位改变 + 训练　；参考：《中国应用生理学杂志》2008年01期

【摘要】：目的:检验反复体位改变训练可提高人体头低位耐力的假设是否正确。方法:6名青年男性被试者经受了为期11 d、共9次反复体位改变训练。在训练前、后分别评价被试者对-30°/30 min头低位倾斜(head-down tilt,HDT)的反应,记录症状、心率、血压、颈部血流等主客观指标。结果:①训练后,被试者在HDT中的反应得到了改善,表现为与训练前相比,HDT中的不良症状明显减轻(症状得分1.00±0.63vs6.00±3.79,P0.05),心率降低的幅度明显增加(-4.4±3.6vs-0.6±2.5,P0.01);②训练前,被试者在HDT中,颈内静脉血流与仰卧位比较明显减少(P0.01),初期颈内动脉血流明显增加(P0.01),颈总动脉血流呈现增加的趋势;训练后,被试者在HDT中,颈内静脉血流与仰卧位比较无显著差别,颈内动脉血流呈现先升后降的趋势,颈总动脉血流呈现降低的趋势。结论:反复体位改变训练可提高人体头低位耐力;血液头向转移得到抑制是反复体位改变训练提高头低位耐力的主要机制。
[Abstract]:Objective: to test whether the hypothesis that repeated posture change training can improve human head-low endurance is correct. Methods six young male subjects underwent 11 days of repeated posture change training. Before and after training, the responses of subjects to -30 掳/ 30 min head-low tilt (head-down tilt) were evaluated, and subjective and objective indexes such as symptoms, heart rate, blood pressure and neck blood flow were recorded. Results after 1: 1 training, the subjects' response to HDT was improved, which showed that the adverse symptoms of HDT were significantly reduced (symptom score 1.00 卤0.63vs6.00 卤3.79), and the heart rate decreased significantly (-4.4 卤3.6vs-0.6 卤2.5 P0.01) before training. Compared with supine position, the blood flow of internal jugular vein decreased significantly (P0.01), the blood flow of internal carotid artery increased obviously (P0.01), and the blood flow of common carotid artery increased in the initial stage, after training, there was no significant difference between the internal jugular vein blood flow and supine position in HDT. The blood flow of the internal carotid artery increased first and then decreased, and that of the common carotid artery decreased. Conclusion: repeated posture change training can improve human head-low endurance, and the inhibition of blood head transfer is the main mechanism of repeated posture change training to improve head-low endurance.
【作者单位】：第四军医大学航空航天医学系中国航天员科研训练中心中国航天员科研训练中心中国航天员科研训练中心中国航天员科研训练中心第四军医大学航空航天医学系
【基金】：中国载人航天工程基金资助(01103304)
【分类号】：R852.22

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