Interaction in peripheral reflexes -Individual difference and training effects

假设肌肉代谢反射和动脉压力反射都参与运动时心率和血压的调节，然后这两种反射相互作用。本研究探讨了肌肉代谢反射中不同刺激水平和不同肌肉激活（前臂和小腿）的相互作用如何变化。1）心脏副交感神经活动的增加和动脉压力感受性反射对心率变化（BRS）的敏感性的增加不发生在肌肉代谢反射的弱激活时，而发生在高于阈值的激活时。在阈值以上，心脏副交感神经活动和BRS没有逐渐增加的趋势; 2）被激活的不同肌肉，心脏副交感神经活动和BRS在肌肉元反射激活过程中的反应存在差异; 3）专项运动训练不改变运动员握力运动诱发的肌肉元反射功能。

It was hypothesized that both muscle metaboreflex and arterial barorefelx contribute to regulate the heart rate and blood pressure during exercise and then the two reflexes were interplayed. This study investigated how the interplays changes in the different stimulus levels in muscle metaboreflex and in the different muscles activated (forearm and calf). Further, it was investigated whether the interplays change by the specific exercise training.1) The increases in heart parasympathetic activity and the sensitivity of the arterial baroreflex on heart rate change (BRS) do not occur with the weak activation of muscle metaboreflex and do occur the above the threshold activation. Above the threshold, there is no gradual increase in heart parasympathetic activity and BRS.2) The responses in heart parasympathetic activity and BRS during activation of the muscle metaboreflex are different between the different muscles activated.3) The function of the muscle metaboreflex induced by handgrip exercise is not changed by the specific exercise training in competitive Badminton players.