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Indexed by:期刊论文

Date of Publication:2022-06-30

Journal:中国生物医学工程学报

Issue:3

Page Number:274-282

ISSN No.:0258-8021

Abstract:There are conflicting results on the impact of resistance trainings on arterial stiffness. To investigate the acute effects of resistance exercise trainings of upper limbs by different workload dumbbells on the arterial stiffness and hemodynamics in the common carotid arteries, ten male healthy young volunteers with average age 21 years (21 �� 2years) underwent two groups of resistance exercise trainings of upper limb with the different workloads on dumbbells. At rest and right after the exercise training, a color ultrasonic doppler test was used to measure the waveforms of arterial diameter and center-line velocity in the right common carotid artery. The heart rate, systolic and diastolic blood pressures were simultaneously measured on the left brachial artery using a sphygmomanometer. All measured data were analyzed based upon Womersely theory. Furthermore, the arterial stiffness, pressure-strain elastic modulus, and associated hemodynamic parameters were calculated. The results of statistical analysis showed that the heart rate and maximum wall shear stress were significantly increased after dumbbells exercises while arterial diameter, mean flow rates and mean blood pressure were not significantly changed; in one cardiac cycle, significant increases could be observd in the maximum center-line velocities and mean systolic blood pressure. After 5 kg workload, maximum flow rate and mean center-line velocities were significantly increased and minimum velocity decreased while arterial stiffness, pressure-strain elastic modulus, diastolic blood pressure, minimum shear stress and OSI were not changed. When dumbbells workload was increased from 5 kg to 7 kg, arterial stiffness, pressure-strain elastic modulus and OSI were significantly increased while the diastolic blood pressure, minimum shear stress significantly reduced. No significant changes were detected in mean center-line velocities and minimum velocity. These results indicated that resistance arm exercise trainings by dumbbells induced significant effects on the local hemodynamic parameters in the common carotid arteries, and acute dumbbells exercise trainings in high intensity of upper limb increased the stiffness of the common carotid artery.

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