Hemodynamics before and after high intensity resistance training

Abstract

[Purpose] To investigate the changes that occurr in body hemodynamics during high-intensity exercise. [Subjects] The subjects were 11 sedentary healthy men. [Methods] In the supine position the subjects performed a straight-leg raise exercise 10 times with an 80% load of maximal voluntary contraction. The hemodynamics were analyzed before and after the exercise. [Results] The systolic blood pressure and low/high frequency ratio of the heart rate fluctuation were found to significantly decrease, but the baroreflex sensitivity significantly increased. The total peripheral vascular resistance was significantly reduced within one to two minutes after termination of the exercise. [Conclusion] Termination of high-intensity resistance exercise leads to relaxation of the peripheral vasculature and increase in the intravascular volume due to a decrease in the total peripheral vascular resistance. Also, sympathetic nerve hyperactivity continues for some time.