Authors:
Midori Tanaka
1
;
Motoaki Sugawara
1
;
Yasuo Ogasawara
2
;
Tadafumi Izumi
1
;
Kiyomi Niki
3
and
Fumihiko Kajiya
2
Affiliations:
1
Faculty of Health Care Sciences, Himeji Dokkyo University, Himeji and Japan
;
2
Department of Medical Engineering, Kawasaki University of Medical Welfare, Kurashiki and Japan
;
3
Biomedical Engineering Department, Tokyo City University, Tokyo and Japan
Keyword(s):
Moderate-intensity Exercise, Cardiopulmonary Exercise Test, Anaerobic Threshold, Respiratory Compensation, Cardiac Contractility.
Related
Ontology
Subjects/Areas/Topics:
Health and Fitness
;
Health, Sports Performance and Support Technology
;
Sport Science Research and Technology
;
Training and Testing
Abstract:
Purpose: We investigated changes in hemodynamic parameters at one-week intervals for 6 weeks after the cessation of the aerobic exercise. Methods: A total of 20 young healthy volunteers were recruited. Using ultrasonic diagnostic equipment, we measured wave intensity (WI) in the carotid artery. The maximum value of WI during a cardiac cycle (W1) increases with an increase in Peak dP/dt. The exercise sessions were 30 min in duration on the bicycle ergometer. Subjects were asked to make an effort to maintain the heart rate during the session at anaerobic threshold (AT) point determined during the pre-exercise cardiopulmonary exercise testing (CPET). Exercise sessions were conducted three times per week over a period of 6 weeks, and then stopped. After the cessation of the exercise sessions, WI was measured during CPET at one-week intervals for six weeks. Results: The work rate (WR) at AT point and at RC point, VO2 at RC point increased and remained increased significantly up to 2 weeks
after the cessation of the exercise. Oxygen consumption (VO2) at AT point also increased, but remained increased significantly only up to 1 week after. RC point W1 increased and remained increased significantly up to 1 week after.
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