DocumentCode :
462126
Title :
Exercise Training Improved Blood Flow Velocity and Autonomic Nervous Activity
Author :
Azhim, Azran ; Katai, Mizuki ; Akutagawa, Masatake ; Hirao, Yuji ; Yoshizaki, Kazuo ; Obara, Shigeru ; Nomura, Masaharu ; Tanaka, Hiroyuki ; Yamaguchi, Hisao ; Kinouchi, Yohsuke
Author_Institution :
Univ. of Tokushima, Tokushima
fYear :
2006
fDate :
11-14 Dec. 2006
Firstpage :
517
Lastpage :
522
Abstract :
The present study aimed to investigate non-invasively the effects of a short-term 4 week aerobic training program on the resting common carotid artery (CCA) blood flow velocity waveforms and autonomic nervous activity in young sedentary healthy subjects. It was hypothesis that training-induced the enhancement of blood flow is associated with the improvement of autonomic nervous function. The CCA blood velocities were measured for 3 minutes at resting sitting posture with synchronized measurement of electrocardiogram (ECG) and brachial blood pressure (BP). Autonomic activity was assessed by low frequency (LF) power, as an index of sympathetic activity and high frequency (HF) power, as an index of parasympathetic activity obtained from power spectral of RR intervals. Training exercise-induced the significant enhancement of all blood velocity waveforms is associated with decreasing of heart rate at rest. The evidence of improvement in training was reinforced by a significant reduction in peripheral vascular resistance and increase in heart rate variability (HRV) and HF power of HRV analysis, an index of vagal tone or parasympathetic activity. However, systolic (SBP), diastolic (DBP) and its mean blood pressure (MBP) are not significantly changed with the training. We conclude that short-term aerobic exercise training could improve cardiovascular and autonomic nervous system functions in the sedentary young men. With the further study, training effect may be simply evaluated using the non-invasive measurement system of blood velocities in CCA.
Keywords :
biomechanics; blood flow measurement; blood pressure measurement; blood vessels; cardiovascular system; electrocardiography; neurophysiology; ECG; autonomic nervous activity; brachial blood pressure measurement; cardiovascular system; common carotid artery blood flow; diastole; electrocardiogram; exercise training; heart rate; heart rate variability analysis; improved blood flow velocity; parasympathetic activity; peripheral vascular resistance; resting sitting posture; short-term aerobic training program; sympathetic activity; synchronized measurement; systole; time 3 min; time 4 week; training-induced blood flow enhancement; vagal tone; young sedentary healthy subjects;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Biomedical and Pharmaceutical Engineering, 2006. ICBPE 2006. International Conference on
Conference_Location :
Singapore
Print_ISBN :
978-981-05-79
Electronic_ISBN :
81-904262-1-4
Type :
conf
Filename :
4155958
Link To Document :
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