Influence of the Autonomic Nervous System in Response to Exercise in Hypertensive Individuals

Summary

Systemic arterial hypertension (SAH) has a direct association with endothelial dysfunction and major cardiovascular events. Evidence points to possible benefits of aerobic training in the endothelial function analyzed by the flow mediated dilation technique (flow mediated dilatation - FMD) in individuals with SAH. However, little is known about the influence of the autonomic nervous system (ANS) on the results of brachial artery FMD after different types of acute exercise in individuals with SAH. Thus, the objective of the research is to analyze the influence of the ANS on the FMD of the brachial artery of individuals with SAH after a session of aerobic (EA), resistance (ER) and combined (EC) exercise. For this, thirty-nine hypertensive individuals aged 35 to 55 years will be recruited and will be randomized to 2 sessions of AS, ER or EC. Also, within each modality, they will be randomized to α1-adrenergic block (Doxazosin 0.05 mg / kg-1) or placebo. The FMD will be performed by ultrasound 10 minutes before, as well as 10, 40 and 70 minutes after the exercise sessions and the autonomic control will be monitored (Finometer) for 10 minutes before each FMD. Arterial stiffness will also be analyzed, using the pulse wave velocity (PWV) by the Complior Analyzer. It is expected to demonstrate with this research the influence of the ANS on the FMD of the brachial artery in individuals with SAH in different physical exercises. This knowledge contributes to a better training prescription in this population.

Timeline

Start

2020-04-30

Primary completion

2020-12-20

Completion

2021-12-23

Publications

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• Background ESH/ESC Task Force for the Management of Arterial Hypertension. 2013 Practice guidelines for the management of arterial hypertension of the European Society of Hypertension (ESH) and the European Society of Cardiology (ESC): ESH/ESC Task Force for the Management of Arterial Hypertension. J Hypertens. 2013 Oct;31(10):1925-38. doi: 10.1097/HJH.0b013e328364ca4c. No abstract available.
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• Waclawovsky G, Boll LFC, Neto SG, Irigoyen MCC, Lehnen AM. Effects of autonomic nervous system activation on endothelial function in response to acute exercise in hypertensive individuals: study protocol for a randomized double-blind study. Trials. 2021 Aug 19;22(1):548. doi: 10.1186/s13063-021-05516-x.

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