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Effects of disturbed blood flow during exercise on endothelial function : a time course analysis

This study aimed to examine the time course of endothelial function after a single handgrip exercise session combined with blood flow restriction in healthy young men. Nine participants (28±5.8 years) completed a single session of bilateral dynamic handgrip exercise (20 min with 60% of the maximum v...

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Main Authors:	Paiva, F.M., Vianna, L.C., Fernandes, I.A., Nóbrega, A.C., Lima, R.M.
Format:	Artigo
Language:	English
Published:	Associação Brasileira de Divulgação Científica 2017
Subjects:	Restrição do fluxo sanguíneo Dilatação fluxomediada Tensão cisalhante
Online Access:	http://repositorio.unb.br/handle/10482/30083 http://dx.doi.org/10.1590/1414-431X20155100
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spelling	ir-10482-300832019-03-28T14:10:26Z Effects of disturbed blood flow during exercise on endothelial function : a time course analysis Paiva, F.M. Vianna, L.C. Fernandes, I.A. Nóbrega, A.C. Lima, R.M. Restrição do fluxo sanguíneo Dilatação fluxomediada Tensão cisalhante This study aimed to examine the time course of endothelial function after a single handgrip exercise session combined with blood flow restriction in healthy young men. Nine participants (28±5.8 years) completed a single session of bilateral dynamic handgrip exercise (20 min with 60% of the maximum voluntary contraction). To induce blood flow restriction, a cuff was placed 2 cm below the antecubital fossa in the experimental arm. This cuff was inflated to 80 mmHg before initiation of exercise and maintained through the duration of the protocol. The experimental arm and control arm were randomly selected for all subjects. Brachial artery flow-mediated dilation (FMD) and blood flow velocity profiles were assessed using Doppler ultrasonography before initiation of the exercise, and at 15 and 60 min after its cessation. Blood flow velocity profiles were also assessed during exercise. There was a significant increase in FMD 15 min after exercise in the control arm compared with before exercise (64.09%±16.59%, P=0.001), but there was no change in the experimental arm (-12.48%±12.64%, P=0.252). FMD values at 15 min post-exercise were significantly higher for the control arm in comparison to the experimental arm (P=0.004). FMD returned to near baseline values at 60 min after exercise, with no significant difference between arms (P=0.424). A single handgrip exercise bout provoked an acute increase in FMD 15 min after exercise, returning to near baseline values at 60 min. This response was blunted by the addition of an inflated pneumatic cuff to the exercising arm. 2017-12-07T05:17:19Z 2017-12-07T05:17:19Z 2016 Artigo PAIVA, F.M. et al. Effects of disturbed blood flow during exercise on endothelial function: a time course analysis. Brazilian Journal of Medical and Biological Research, Ribeirão Preto, v. 49, n. 4, e5100, 2016. Disponível em: <http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2016000400701&lng=en&nrm=iso>. Acesso em: 12 mar. 2018. Epub Feb 23, 2016. doi: http://dx.doi.org/10.1590/1414-431X20155100. http://repositorio.unb.br/handle/10482/30083 http://dx.doi.org/10.1590/1414-431X20155100 en Acesso Aberto Brazilian Journal of Medical and Biological Research - This is an Open Access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0). Fonte: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2016000400701&lng=en&nrm=iso. Acesso em: 12 mar. 2018. application/pdf Associação Brasileira de Divulgação Científica
institution	REPOSITORIO UNB
collection	REPOSITORIO UNB
language	English
topic	Restrição do fluxo sanguíneo Dilatação fluxomediada Tensão cisalhante
spellingShingle	Restrição do fluxo sanguíneo Dilatação fluxomediada Tensão cisalhante Paiva, F.M. Vianna, L.C. Fernandes, I.A. Nóbrega, A.C. Lima, R.M. Effects of disturbed blood flow during exercise on endothelial function : a time course analysis
description	This study aimed to examine the time course of endothelial function after a single handgrip exercise session combined with blood flow restriction in healthy young men. Nine participants (28±5.8 years) completed a single session of bilateral dynamic handgrip exercise (20 min with 60% of the maximum voluntary contraction). To induce blood flow restriction, a cuff was placed 2 cm below the antecubital fossa in the experimental arm. This cuff was inflated to 80 mmHg before initiation of exercise and maintained through the duration of the protocol. The experimental arm and control arm were randomly selected for all subjects. Brachial artery flow-mediated dilation (FMD) and blood flow velocity profiles were assessed using Doppler ultrasonography before initiation of the exercise, and at 15 and 60 min after its cessation. Blood flow velocity profiles were also assessed during exercise. There was a significant increase in FMD 15 min after exercise in the control arm compared with before exercise (64.09%±16.59%, P=0.001), but there was no change in the experimental arm (-12.48%±12.64%, P=0.252). FMD values at 15 min post-exercise were significantly higher for the control arm in comparison to the experimental arm (P=0.004). FMD returned to near baseline values at 60 min after exercise, with no significant difference between arms (P=0.424). A single handgrip exercise bout provoked an acute increase in FMD 15 min after exercise, returning to near baseline values at 60 min. This response was blunted by the addition of an inflated pneumatic cuff to the exercising arm.
format	Artigo
author	Paiva, F.M. Vianna, L.C. Fernandes, I.A. Nóbrega, A.C. Lima, R.M.
author_sort	Paiva, F.M.
title	Effects of disturbed blood flow during exercise on endothelial function : a time course analysis
title_short	Effects of disturbed blood flow during exercise on endothelial function : a time course analysis
title_full	Effects of disturbed blood flow during exercise on endothelial function : a time course analysis
title_fullStr	Effects of disturbed blood flow during exercise on endothelial function : a time course analysis
title_full_unstemmed	Effects of disturbed blood flow during exercise on endothelial function : a time course analysis
title_sort	effects of disturbed blood flow during exercise on endothelial function : a time course analysis
publisher	Associação Brasileira de Divulgação Científica
publishDate	2017
url	http://repositorio.unb.br/handle/10482/30083 http://dx.doi.org/10.1590/1414-431X20155100
_version_	1641988576280313856
score	13.657419

Effects of disturbed blood flow during exercise on endothelial function : a time course analysis

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