Effects of Weekly Interval Training at Different Intensity on Dynamic cardiorespiratory Responses

Abstract

There is strong evidence that exercise intensity mediates central and peripheral cardiovascular and respiratory adaptations to exercise and improvements in maximum aerobic capacity (VO2max). However, the effects of different exercise intensity on once-a-week interval training are uncertain for dynamic cardio-respiratory responses to exercise. 16 male college student athletes divided into 2 groups of 95% or 80% intensity (TG95%, TG80%,), trained weekly for 8 weeks. The training consisted of three bouts of exercises to volitional fatigue at TG95% or TG80% maximum work rate.Regardless different of training intensity, increased VO2max and maximal exercise performance in both training groups were observed after training program (P <0.01). TG95% induced cardiac adaptation in enhancing heart rate during maximal exercise. The present results indicate that high intensity interval training markedly induces training intensity-dependent specific cardiorespiratory response at the onset of exercise through changes in autonomic neural regulation.