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急性自行车运动干预对颈总动脉血流动力学的影响:女篮运动员与普通女性的比较

Effects of acute cycling on common carotid arterial hemodynamics:female basketball athletse vs. female controls

作者: 刘海斌  申华  陈哲夫  王洁群  覃开蓉                  
单位:                      大连理工大学体育科学研究所(辽宁大连116023)        
关键词:                     自行车运动干预;篮球运动;颈总动脉;动脉硬度;血流动力学          
分类号:
出版年·卷·期(页码):2014·33·5(467-474)
摘要:

目的 比较相同运动干预对运动员和普通人群产生的血流动力学影响,为寻找有效预防或逆转动脉硬度增加的运动训练方式提供一定参考。方法 以10名女子篮球运动员(运动员组)和10名普通女性大学生(对照组)为实验对象,连续踩踏4组功率自行车训练为运动干预,采用超声多普勒技术测量与计算颈总动脉在静息状态和运动干预后颈总动脉相关血流动力学参数:心率、血压、动脉硬度、动脉管径、轴心血流速度、搏动指数、血流量率、周向应变和壁面剪切力。结果 在静息状态下,运动员组动脉硬度低,动脉管径大,心率和轴心血液流速低,平均血流量率高,收缩压和平均压低,最大和平均壁面剪切力小,最小壁面剪切力大。施加相同强度自行车运动干预后2组均表现为,周向应变、心率、轴心血液流速、血流量率、收缩压、最大和平均壁面剪切力均显著地增加。而运动员组的颈总动脉硬度、心率、轴心血液流速、收缩压、最大和平均壁面剪切力和搏动指数显著地低于对照组,动脉管径和舒张压显著大于对照组。结论 在施加急性运动干预时,运动员组颈总动脉表现出了更好的顺应性,这可能是因为长期篮球运动训练已经改善了运动员组动脉的结构与功能(动脉管径增大与硬度降低),使得运动员组具有更好的静息大脑供血能力。另外,对照组的壁面切应力相较于运动员组具有更强的振荡性,动脉硬度急性增大。如果长期坚持急性自行车训练,有可能对颈总动脉血管结构与功能产生不利影响。

Objective This study was to compare the effects of the same workload of cycling intervention on hemodynamics between athletes and sedentary controls in order to find an effective exercise mode to prevent and reverse arterial stiffness. Methods Ten female college basketball athletes (BA) and ten age-matched controls (AC) were recruited and successively underwent four stages of cycling intervention. At baseline and after intervention, ultrasonic Doppler techniques were used to measure and calculate hemodynamic variables in carotid arteries including heart rate(HR), blood pressure(BP), arterial stiffness, arterial diameters(AD), center-line velocity(CV), pulsatility index(PI), blood flow rates(FR), circumferential strain(CS) and wall shear stress(WSS). Results Compared with AC at baseline, BA demonstrated: lower arterial stiffness, larger AD, lower HR and CV, higher mean FR, lower systolic and mean BP, lower max and mean WSS, higher min WSS. After intervention, both groups showed: CS, HR, CV, max and min FR, systolic BP, max and mean WSS increased significantly. Compared with AC after the same workload of cycling intervention, BA demonstrated: lower Arterial stiffness and larger AD, lower HR, CV, PI, systolic BP, max and mean WSS, and higher diastolic BP. Conclusions The arteries in BA demonstrated a better compliance in response to the same workload of acute intervention. The improved arterial structure and function in BA (decreased arterial stiffness and larger AD) might result from long-term basketball training and lead a better resting blood supply to brain. In addition, AC showed higher oscillatory WSS and increased arterial stiffness compared with BA. Long-term acute cycling exercise might have a detrimental effect on common carotid arterial structure and function.

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