The Effect of Muscle Metaboreflex on Baroreflex Sensitivity after Static Exercise

Abstract

[Purpose] This study investigated whether the metaboreflex influences the baroreflex sensitivity. [Subjects] Data were collected from 10 healthy subjects. [Methods] All subjects performed a 30% maximum voluntary contraction, and then performed two consecutive five-minutes exercise periods. Each exercise period was followed with or without post exercise ischemia (PEI), in randomized order. ECG and blood pressure were recorded continuously. In addition, baroreflex sensitivity (BRS) was assessed using time domain analysis (sequence) of systolic blood pressure and the R-R interval. [Results] Under both conditions, HR did not change after exercise compared with rest. However, after exercise with PEI, SBP in the PEI was significantly higher than at rest, while there was no significant change after exercise without PEI. In addition, BRS values did not change in either condition. [Conclusion] The present results suggest that the muscle metaboreflex dose not influence BRS.