短臂离心机训练时前庭刺激对心血管功能的影响  

Effect of vestibular stimulation on cardiovascular function during short-arm centrifugation

作　　者：刘达[1] 高原[2] 赵吉林第四军医大学学员队 孔明[1] 王永春[2] 孙喜庆[2] LIU Da GAO Yuan ZHAO Ji-lin KONG Ming WANG Yong-chun SUN Xi-qing(2011 Grade Department of Aerospace Biodynamics, School of Aerospace Medicine, Fourth Military Medical University, Xi＇an 710032, Shaanxi, China)

机构地区：[1]第四军医大学学员队 [2]第四军医大学航空航天医学系航空航天生物动力学教研室,西安710032

出　　处：《心脏杂志》2017年第1期93-97,共5页Chinese Heart Journal

基　　金：全军后勤科研重大项目资助(AWS12J003-01)

摘　　要：目的探讨短臂离心机训练过程中增加前庭功能刺激对心血管功能的影响。方法 9名被试者分别完成不转头和间断左右转头45度两次人体短臂离心机暴露,足水平2 Gz,持续10 min,记录实验过程中被试者血压、心率等变化并进行心率变异性分析,同时进行前庭功能评价。结果在短臂离心机暴露复合前庭刺激时,被试者心率、舒张压、心率变异性低频功率、低频功率/高频功率较暴露前均显著升高(P<0.05,舒张压P<0.01),心率变异性高频功率显著降低(P<0.05);与单独短臂离心机暴露相比,舒张压显著升高(P<0.05),低频功率/高频功率呈现升高趋势,但未达到显著水平。结论短臂离心机暴露复合前庭刺激可增强心脏交感神经兴奋性,改善心血管功能,有助于提高训练效果。AIM To observe the effect of vestibular stimulation by head movement on cardiovascular functions during short-arm centrifugation. METHODS Nine subjects were exposed to short-arm centrifuge of 2 Gz at feet level for 10 rain with head still and intermittent separate head-turns. Heart rate, blood pressure and heart rate variability （HRV） were measured and vestibular function was evaluated during exposure. RESULTS Compared to those pre-exposure, heart rate, diastolic pressure, low frequency of HRV and the ratio of low frequency to high frequency （LH/HF） decreased significantly in subjects with head-turns during short-arm centrifugation. Diastolic pressure was significantly higher, whereas LH/HF had a tendency to increase in the subjects with head-turns compared with those in the subjects with head still during short-arm centrifugation. CONCLUSION Short-arm centrifugation combined with vestibular stimulation enhances the excitability of cardiac sympathetic nerves and promotes cardiovascular functions, thus improving training efficiency.

关 键 词：心血管功能 前庭刺激 短臂离心机 训练 

分 类 号：R852.21[医药卫生—航空、航天与航海医学]