Neural Regulation of Cardiovascular Response to Exercise: Role of Central Command and Peripheral Afferents
Figure 6
Representative trace of a subject receiving hyperoxia at rest (top) and during exercise (bottom). Hyperoxia was administered from 60 s to 120 s. There was no significant change on muscle sympathetic nerve activity (MSNA) during hyperoxia administration at rest. On the other hand, hyperoxia administration during exercise reduced MSNA by roughly 35%. This showed that the carotid chemoreflex was sensitized, and that it contributed to the MSNA increase during exercise. , end tidal oxygen pressure; , end tidal carbon dioxide pressure.
