Abstract
To investigate the effects of acute aerobic and resistance exercise on the arterial stiffness and the left ventricular systolic time interval(STI), high school students(16.4±.8 yrs, n=15) were tested at resting state, immediately after exercise, recovery 1hr, and 2hr. Experiments were performed in 3 conditions; control without any handling, aerobic exercise with track running at 80% HRR, and resistance exercise with maximal repetitions at 60% RM on bench press, arm curl, leg press and leg curl. Data were analyzed by repeated two-way ANOVA on time and exercise type. As results, ABPI, baPWV and AIx, that were arterial stiffness variables, were tend to decrease at immediately after aerobic and resistance exercise, but these variables were recovered and increased than the resting values during recovery 1hr and 2hr. The patterns of STI, LVET and PEP/LVET, that were left cardiac contractility variables, were similar with those of arterial stiffness variables during recovery periods after aerobic and resistance exercise. In conclusion, the arterial stiffness was decreased at immediately after aerobic and resistance exercise, but they were increased during recovery. These changes of arterial stiffness variables seemed to be independent with left cardiac contractility variables.
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