间歇式无氧功率自行车训练对颈总动脉血液动力学的影响  

Effects of Intermittent Anaerobic Exercise Trainings by a Bicycle Ergometer on the Hemodynamics in the Common Carotid Arteries

作　　者：侯杰[1] 申华[1,2] 刘睿[1] 覃开蓉[1] 

机构地区：[1]大连理工大学电子信息与电气工程学部生物医学工程系,大连116024 [2]大连东软信息学院电子工程系,大连116023

出　　处：《复旦学报（自然科学版）》2013年第5期653-660,共8页Journal of Fudan University：Natural Science

基　　金：国家自然科学基金(31370948);国家科技支撑计划(2012BAJ18B06);中央高校基本科研业务费(DUT12JB11)资助

摘　　要：为研究间歇式无氧功率自行车运动对人体颈总动脉血液动力学的影响，选取10名20~30年龄段的健康男性志愿者作为研究对象，使用无氧功率自行车进行一组间歇式等强度的无氧运动训练．应用彩色超声多普勒技术分别检测静息状态及运动训练后的颈总动脉管径波形和轴心流速波形，并用电子自动血压计同步检测肱动脉收缩压和舒张压大小．基于检测的实验数据，运用Womersley理论进行血液动力学分析，计算颈总动脉的血液动力学参数，包括动脉硬度、流量率、周向应变、壁面切应力和振荡剪切指数等．对检测结果和计算出的相关动力学参数进行统计分析处理，分析结果显示：运动后心率显著增加；动脉硬度显著增加，管径显著减小；一个心动周期内轴心血流速度和流量率的最大值与平均值上升，流速和流量率的最小值下降；收缩压、舒张压和平均压显著性增高，周向应变显著增加；切应力最大值明显增加，切应力最小值下降；振荡剪切指数显著增大．这些结果表明，间歇式无氧功率自行车训练对颈总动脉血液动力学特征产生明显的影响，并能急性地降低颈总动脉的弹性特性．To investigate the acute effects of intermittent anaerobic exercise trainings by a bicycle ergometer on the hemodynamics in the common carotid arteries, ten male healthy young volunteers with age 20--30 years old underwent a group of intermittent exercise trainings with the same workload on an anaerobic bicycle ergometer. At rest and right after the exercise trainings, the waveforms of arterial diameter and center-line velocity were measured in the right common carotid artery using a color Ultrasonic Doppler. The heart rate, the systolic and diastolic blood pressures were simultaneously measured in the brachial artery using a sphygmomanometer. All the measured data were analyzed based upon Womersely theory. Furthermore, a series of hemodynamic parameters, including arterial stiffness, flow rate, circumferential strain, shear stress and oscillatory shear index （OSI）, were then calculated. The statistical results show that the heart rate and arterial stiffness increased after exercises while artery diameter significantly decreased. In one cardiac cycle, the maximum and mean center-line velocities and flow rates increased while the minimum velocity and flow rate decreased. The systolic, diastolic and mean blood pressure significantly increased. Significant change could be found in the circumferential strain, either. The maximum and mean shear stress enhanced significantly while the minimum shear stress reduced; the oscillatory shear index also increased. The results indicate that the intermittent anaerobic power bicycle trainings induce significant effects on the local hemodynamic parameters in the common carotid arteries, and acutely decrease the elastic characteristics of the common carotid artery.

关 键 词：间歇式无氧运动 功率自行车 颈总动脉 血液动力学 

分 类 号：R318.01[医药卫生—生物医学工程]