急性中等强度有氧运动对久坐人群颈总动脉硬度与血液动力学的影响

发布时间：2018-11-02 20:21

【摘要】：该文为研究急性中等强度有氧运动对久坐人群颈总动脉硬度和血液动力学的影响,招募12名没有运动习惯的男性志愿者作为实验对象,使用功率自行车进行30 min中等强度有氧运动干预。应用彩色超声多普勒技术测量静息状态和运动干预后3 min,15 min和30 min的颈总动脉管径和轴心血流速度波形,并使用电子血压计同步检测肱动脉血压值。基于测量的实验数据,采用Womersley理论进行血液动力学建模,计算颈总动脉血液动力学参数,包括:动脉硬度、血流量率、外周阻力、周向应变、壁面切应力和振荡剪切指数。结果表明,急性中等强度有氧运动没有显著地改变颈总动脉硬度,但明显降低颈总动脉外周阻力;运动干预后心率增加,颈总动脉平均血流量率增加和颈总动脉平均管径变小;运动干预使血压升高,周向应变增大。颈总动脉壁面切应力振荡幅度显著增加,表现为运动后振荡剪切指数持续增加。此结果为进一步深入研究长期有氧运动改善动脉弹性的血液动力学机制提供了一定的基础。
[Abstract]:In order to study the effect of acute moderate intensity aerobic exercise on common carotid artery hardness and hemodynamics in sedentary population, 12 male volunteers without exercise habit were recruited as subjects. The medium intensity aerobic exercise for 30 min was carried out by using power bicycle. The common carotid artery diameter and axial blood flow velocities were measured at 3 min,15 min and 30 min after resting state and exercise intervention by color ultrasound Doppler technique. The brachial artery blood pressure was measured synchronously by electronic sphygmomanometer. Based on the measured experimental data, the Womersley theory was used to model the hemodynamics of the common carotid artery. The parameters of hemodynamics were calculated, including: arterial hardness, blood flow rate, peripheral resistance, circumferential strain, wall shear stress and oscillatory shear index. The results showed that acute moderate intensity aerobic exercise did not significantly change the hardness of the common carotid artery, but significantly reduced the peripheral resistance of the common carotid artery, the heart rate increased, the mean blood flow rate of the common carotid artery increased and the average diameter of the common carotid artery became smaller after exercise intervention. Exercise intervention increased blood pressure and circumferential strain. The amplitude of shear stress oscillation on the wall of common carotid artery increased significantly, and the oscillatory shear index increased continuously after exercise. These results provide a basis for further study on the hemodynamic mechanism of long-term aerobic exercise in improving arterial elasticity.
【作者单位】：大连理工大学体教部;大连理工大学电信学部生物医学工程系;大连理工大学运载工程与力学学部工程力学系;
【基金】：国家自然科学基金项目(31370948) 中央高校基本科研业务费项目(DUT15QY12)~~
【分类号】：R87

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