Volume 3, Issue 2 (Summer 2000)                   J Arak Uni Med Sci 2000, 3(2): 13-17 | Back to browse issues page

XML Persian Abstract Print


Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:

Changizi Ashtiyani S, Khameneh S, Salimi Khaligh H. A Study on Adaption Process Carotid Baroreflex in Isometric & Dynamic Exercise. J Arak Uni Med Sci 2000; 3 (2) :13-17
URL: http://jams.arakmu.ac.ir/article-1-6616-en.html
1- School of Medicine, Arak University of Medical Sciences, Arak, Iran.
2- Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran.
Abstract:   (774 Views)
Arterial baroreflexes are the most important mechanism of cardiovascular system that can respond to rapid blood pressure changes during everyday activities. In this study we have assessed adaptive responses of carotid baroreflexes during isometric & dynamic exercise and compared the results with acute response during rest. The applied work loud in dynamic exercise was 100 watts and in isometric exercise it was 50% of calculated maximum force. Experiments were performed on 12 young male healthy sedentary volunteers aged between 21-28. This study was done in three exercises. In all three protocles, adaptation process during stimulation was assessed by studying of beat to beat R-R interval of ECG. In order to stimulate the carotid baroreceptors neck suction device Eckberg model was used and duration of stimulation was 10 seconds. ECG was taken carefully. Examination of adaptive process during stimulation showed maximal response achieved in resting state is statistically significant compared with that of isometric and dynamic exercise respectively (P<0.038, P<0.007). where as, comparison of adaptive response of rest state with isometric exercise and dynamic exercise was not statistically significant. There is no significant relation between maximal and adaptative response in dynamic and isometric exercises, although in general adaptative process in resting state compared with isometric and dynamic exercise was more pronounced. This observation confirmed that Vagal withdrawal with alimited degree of sympathic stimulation are challenged in this phenomenon. In other words the Sa response to vagal stimulation is related by sympathic stimulation.
Full-Text [PDF 1598 kb]   (214 Downloads)    
Type of Study: Original Atricle | Subject: General
Accepted: 2000/06/21

Add your comments about this article : Your username or Email:
CAPTCHA

Rights and permissions
Creative Commons License This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

© 2024 CC BY-NC 4.0 | Journal of Arak University of Medical Sciences

Designed & Developed by : Yektaweb