短臂离心机重力暴露及有氧运动对心血管功能的影响  

Changes of cardiovascular function caused by short arm centrifuge exposure and aerobic exercise

作　　者：杨长斌[1] 张玉[1] 高原[1] 王雷[1] 姚永杰[1] 孙喜庆[1] 

机构地区：[1]第四军医大学航空航天医学系 教育部航空航天医学重点实验室,西安710032

出　　处：《中华航空航天医学杂志》2010年第4期245-250,共6页Chinese Journal of Aerospace Medicine

基　　金：第四军医大学璞玉基金（04J012）

摘　　要：目的 观察利用短臂离心机单纯人工重力暴露、单纯有氧运动锻炼、人工重力暴露联合有氧运动锻炼3种锻炼方案对心血管功能及心脏自主神经调节功能的影响.方法 将24名健康青年男性志愿者随机分为3组:单纯人工重力暴露组、单纯有氧运动锻炼组及人工重力暴露联合运动锻炼组,每组8人.单纯人工重力暴露组进行间断梯度G值(1～2 G)离心机锻炼,单纯有氧运动锻炼组进行40 W的有氧运动负荷锻炼,人工重力暴露联合有氧运动锻炼组则进行间断梯度G值(1～2 G)离心机暴露,同时进行40 W运动锻炼,每天30 min,持续1周.采集心电图和逐跳连续血压,分析心率变异性与收缩压变异性功率谱.采用心电机械图法和阻抗法测量锻炼前后心脏的收缩与泵血功能.结果 人工重力暴露联合有氧运动锻炼组1周后受试者心率较锻炼前显著下降,且有统计学意义(P＜0.05),每搏量、左室射血时间及血压变异性低频功率较锻炼前显著增加,且有统计学意义(P＜0.05),而其他两组以上参数无显著变化.结论 1周人工重力暴露联合40 W有氧运动负荷锻炼可显著增强心脏泵血功能及自主神经调节功能.上述参数的明显改善可能得益于人工重力与有氧运动的复合作用.Objective To investigate the changes of cardiovascular function and cardiovascular autonomic nervous regulation caused by short arm centrifuge exposure (SAC), aerobic exercise (EX),or their combination (SAC+ EX).Methods Twenty-four healthy male subjects were randomly and averagely divided into 3 groups that executed SAC, EX and SAC+ EX respectively.Subjects in SAC group experienced 1-2 G centrifuge training while EX group merely performed aerobic exercise with 40 W-load.In SAC+ EX group, subjects performed 40 W-load exercise for 30 min when they exposed on centrifuge once a day for 1 week.Electrocardiogram, continue blood pressure were monitored and used for HR variation and systolic blood pressure variation spectrum a(n)alysis.The training caused changes on systole and blood-pumping functions were got by analyzing mechanical-cardiogram and impedance-cardiogram.Results Analysis showed that 1-week SAC+EX training improved subjects' cardiac pumping function and cardiovascular autonomic nervous modulation, which associated with significant decreased heart rate (P＜0.05) and significant increased stroke volume (SV), left ventricular ejection time (LVET) and lower frequency (0.04-0.15 Hz) of arterial pressure spectral power (P＜0.05) as compared with those in other 2 groups.Conclusions 1-week SAC+40 W-load EX training could significantly improve cardiac pumping function, cardiac vagal modulation and peripheral smooth muscle vascular tone.Such combined action promotes the changes.However,alternative SAC or EX training is not sufficient enough to induce similar alterations.

关 键 词：抗失重措施 重力 改变 运动 心脏功能试验 

分 类 号：R852.22[医药卫生—航空、航天与航海医学]