Interaction in peripheral reflexes -Individual difference and training effects

假设运动中肌肉代谢性反射和动脉压力感受性反射都有助于调节心率和血压，然后这两种反射相互作用。这项研究调查了肌肉代谢反射和不同肌肉(前臂和小腿)在不同刺激水平下的相互作用如何变化。1)心脏副交感神经活性和动脉压力反射对心率变化的敏感性不随肌肉代谢性反射的弱激活而增加，而是在阈值以上激活。在阈值以上，心脏副交感神经活动和BRS不会逐渐增加。2)不同被激活的肌肉对心脏副交感神经活动和BRS的反应不同。3)竞技羽毛球运动员的专项运动训练不会改变握手运动引起的肌肉代谢反射功能。

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.