Efeito do treinamento de força com restrição do fluxo sanguíneo sobre a atividade metaborreflexa em jovens saudáveis

Detalhes bibliográficos
Autor(a) principal: Farias, Rafael Riera de
Data de Publicação: 2017
Tipo de documento: Dissertação
Idioma: por
Título da fonte: Biblioteca Digital de Teses e Dissertações da UERJ
Texto Completo: http://www.bdtd.uerj.br/handle/1/8309
Resumo: Ischemic training (IT) has been proposed as a tool to induce muscle hypertrophy, but its safety remains controversial as it may cause mean blood pressure (MBP) increments due to the activation of the muscle metaboreflex (MM). However, IT also causes metabolites accumulation that in turn may desensitise type III and IV nerve endings, which are thought to trigger the MM1. Then, we hypothesised that a period of IT would result in a blunted hemodynamic activation during the MM. In order to evaluate the effect of IT on heart rate (HR), ventricular filling time, systolic volume ratio / left ventricular ejection time, MAP, systolic volume (SV), cardiac output (CO), and peripheral vascular resistance (PVR) to the activation of MM in healthy youngsters. 17 young healthy male (age 21±2 yrs) took part in this study. Hemodynamics during the MM was obtained by the method of the post-exercise muscle ischemia2 at baseline (T0) and after one month (T1) of dynamic IT (handgrip), conducted at 30% of maximum voluntary contraction in the dominant arm with circulatory occlusion, which was obtained with a pressure of 50 mmHg above systolic blood pressure. IT was applied for 3 days/week. Hemodynamic measurements were assessed by means of impedance cardiograph, which has been commonly employed in resting and exercising subjects. The main results were that none of the studied parameters changed in response to MM after IT. In detail, MBP response was +4.09±3.87 vs. +2.23±4.65 mmHg at T0 and T1 respectively (p>0.05). Similarly, there was no difference in HR (-3.47±9.26 vs 0.81±9.96 bpm), SV (+11.3±20.2 vs. +2.28±13.07 mL), CO (+349±1643.4 vs. +57.2±801.9 mL*l-1), SVR (-14.6±201.6 vs. +5.59±104.9 dynes·s-1·cm-5) and VFR ( 5,8 +/- 2,8 vs 9,3+/- 3,3 ml/s). Contrary to initial hypothesis, this investigation provides evidence that a period of 4 weeks of IT is not able to change the hemodynamic response to metaboreflex activation in young healthy male subjects. Thus, the IT protocol employed in the present investigation was not able to desensitise type III and IV nerve endings.
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spelling Oliveira, Ricardo Brandão dehttp://lattes.cnpq.br/9250244417873352Petriz, João Luiz Fernandeshttp://lattes.cnpq.br/2350137889023236Borges, Juliana Pereirahttp://lattes.cnpq.br/0099231329440275http://lattes.cnpq.br/0238117059121875Farias, Rafael Riera de2021-01-05T18:51:02Z2018-07-262017-06-29http://www.bdtd.uerj.br/handle/1/8309Ischemic training (IT) has been proposed as a tool to induce muscle hypertrophy, but its safety remains controversial as it may cause mean blood pressure (MBP) increments due to the activation of the muscle metaboreflex (MM). However, IT also causes metabolites accumulation that in turn may desensitise type III and IV nerve endings, which are thought to trigger the MM1. Then, we hypothesised that a period of IT would result in a blunted hemodynamic activation during the MM. In order to evaluate the effect of IT on heart rate (HR), ventricular filling time, systolic volume ratio / left ventricular ejection time, MAP, systolic volume (SV), cardiac output (CO), and peripheral vascular resistance (PVR) to the activation of MM in healthy youngsters. 17 young healthy male (age 21±2 yrs) took part in this study. Hemodynamics during the MM was obtained by the method of the post-exercise muscle ischemia2 at baseline (T0) and after one month (T1) of dynamic IT (handgrip), conducted at 30% of maximum voluntary contraction in the dominant arm with circulatory occlusion, which was obtained with a pressure of 50 mmHg above systolic blood pressure. IT was applied for 3 days/week. Hemodynamic measurements were assessed by means of impedance cardiograph, which has been commonly employed in resting and exercising subjects. The main results were that none of the studied parameters changed in response to MM after IT. In detail, MBP response was +4.09±3.87 vs. +2.23±4.65 mmHg at T0 and T1 respectively (p>0.05). Similarly, there was no difference in HR (-3.47±9.26 vs 0.81±9.96 bpm), SV (+11.3±20.2 vs. +2.28±13.07 mL), CO (+349±1643.4 vs. +57.2±801.9 mL*l-1), SVR (-14.6±201.6 vs. +5.59±104.9 dynes·s-1·cm-5) and VFR ( 5,8 +/- 2,8 vs 9,3+/- 3,3 ml/s). Contrary to initial hypothesis, this investigation provides evidence that a period of 4 weeks of IT is not able to change the hemodynamic response to metaboreflex activation in young healthy male subjects. Thus, the IT protocol employed in the present investigation was not able to desensitise type III and IV nerve endings.Ischemic training (IT) has been proposed as a tool to induce muscle hypertrophy, but its safety remains controversial as it may cause mean blood pressure (MBP) increments due to the activation of the muscle metaboreflex (MM). However, IT also causes metabolites accumulation that in turn may desensitise type III and IV nerve endings, which are thought to trigger the MM1. Then, we hypothesised that a period of IT would result in a blunted hemodynamic activation during the MM. In order to evaluate the effect of IT on heart rate (HR), ventricular filling time, systolic volume ratio / left ventricular ejection time, MAP, systolic volume (SV), cardiac output (CO), and peripheral vascular resistance (PVR) to the activation of MM in healthy youngsters. 17 young healthy male (age 21±2 yrs) took part in this study. Hemodynamics during the MM was obtained by the method of the post-exercise muscle ischemia2 at baseline (T0) and after one month (T1) of dynamic IT (handgrip), conducted at 30% of maximum voluntary contraction in the dominant arm with circulatory occlusion, which was obtained with a pressure of 50 mmHg above systolic blood pressure. IT was applied for 3 days/week. Hemodynamic measurements were assessed by means of impedance cardiograph, which has been commonly employed in resting and exercising subjects. The main results were that none of the studied parameters changed in response to MM after IT. In detail, MBP response was +4.09±3.87 vs. +2.23±4.65 mmHg at T0 and T1 respectively (p>0.05). Similarly, there was no difference in HR (-3.47±9.26 vs 0.81±9.96 bpm), SV (+11.3±20.2 vs. +2.28±13.07 mL), CO (+349±1643.4 vs. +57.2±801.9 mL*l-1), SVR (-14.6±201.6 vs. +5.59±104.9 dynes·s-1·cm-5) and VFR ( 5,8 +/- 2,8 vs 9,3+/- 3,3 ml/s). Contrary to initial hypothesis, this investigation provides evidence that a period of 4 weeks of IT is not able to change the hemodynamic response to metaboreflex activation in young healthy male subjects. Thus, the IT protocol employed in the present investigation was not able to desensitise type III and IV nerve endings.Submitted by Boris Flegr (boris@uerj.br) on 2021-01-05T18:51:02Z No. of bitstreams: 1 Rafael Riera de Farias_Dissertacao.pdf: 1785959 bytes, checksum: ccd1fb5dc6f6c8c5fbdb0a709c701b30 (MD5)Made available in DSpace on 2021-01-05T18:51:02Z (GMT). No. of bitstreams: 1 Rafael Riera de Farias_Dissertacao.pdf: 1785959 bytes, checksum: ccd1fb5dc6f6c8c5fbdb0a709c701b30 (MD5) Previous issue date: 2017-06-29application/pdfporUniversidade do Estado do Rio de JaneiroPrograma de Pós-Graduação em Ciências do Exercício e do EsporteUERJBRCentro de Educação e Humanidades::Instituto de Educação Física e DesportoIsquemicMetaborreflexRestrict blood flowExercícios físicos Aspectos fisiológicosFluxo sanguíneoIsquemiaMetaborreflexoRestrição de fluxoCNPQ::CIENCIAS DA SAUDE::EDUCACAO FISICAEfeito do treinamento de força com restrição do fluxo sanguíneo sobre a atividade metaborreflexa em jovens saudáveisEffects of resistence training with restrict blood flow at the metaboreflex in healthy youngsinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisinfo:eu-repo/semantics/openAccessreponame:Biblioteca Digital de Teses e Dissertações da UERJinstname:Universidade do Estado do Rio de Janeiro (UERJ)instacron:UERJORIGINALRafael Riera de Farias_Dissertacao.pdfapplication/pdf1785959http://www.bdtd.uerj.br/bitstream/1/8309/1/Rafael+Riera+de+Farias_Dissertacao.pdfccd1fb5dc6f6c8c5fbdb0a709c701b30MD511/83092024-02-26 16:27:39.386oai:www.bdtd.uerj.br:1/8309Biblioteca Digital de Teses e Dissertaçõeshttp://www.bdtd.uerj.br/PUBhttps://www.bdtd.uerj.br:8443/oai/requestbdtd.suporte@uerj.bropendoar:29032024-02-26T19:27:39Biblioteca Digital de Teses e Dissertações da UERJ - Universidade do Estado do Rio de Janeiro (UERJ)false
dc.title.por.fl_str_mv Efeito do treinamento de força com restrição do fluxo sanguíneo sobre a atividade metaborreflexa em jovens saudáveis
dc.title.alternative.eng.fl_str_mv Effects of resistence training with restrict blood flow at the metaboreflex in healthy youngs
title Efeito do treinamento de força com restrição do fluxo sanguíneo sobre a atividade metaborreflexa em jovens saudáveis
spellingShingle Efeito do treinamento de força com restrição do fluxo sanguíneo sobre a atividade metaborreflexa em jovens saudáveis
Farias, Rafael Riera de
Isquemic
Metaborreflex
Restrict blood flow
Exercícios físicos Aspectos fisiológicos
Fluxo sanguíneo
Isquemia
Metaborreflexo
Restrição de fluxo
CNPQ::CIENCIAS DA SAUDE::EDUCACAO FISICA
title_short Efeito do treinamento de força com restrição do fluxo sanguíneo sobre a atividade metaborreflexa em jovens saudáveis
title_full Efeito do treinamento de força com restrição do fluxo sanguíneo sobre a atividade metaborreflexa em jovens saudáveis
title_fullStr Efeito do treinamento de força com restrição do fluxo sanguíneo sobre a atividade metaborreflexa em jovens saudáveis
title_full_unstemmed Efeito do treinamento de força com restrição do fluxo sanguíneo sobre a atividade metaborreflexa em jovens saudáveis
title_sort Efeito do treinamento de força com restrição do fluxo sanguíneo sobre a atividade metaborreflexa em jovens saudáveis
author Farias, Rafael Riera de
author_facet Farias, Rafael Riera de
author_role author
dc.contributor.advisor1.fl_str_mv Oliveira, Ricardo Brandão de
dc.contributor.advisor1Lattes.fl_str_mv http://lattes.cnpq.br/9250244417873352
dc.contributor.referee1.fl_str_mv Petriz, João Luiz Fernandes
dc.contributor.referee1Lattes.fl_str_mv http://lattes.cnpq.br/2350137889023236
dc.contributor.referee2.fl_str_mv Borges, Juliana Pereira
dc.contributor.referee2Lattes.fl_str_mv http://lattes.cnpq.br/0099231329440275
dc.contributor.authorLattes.fl_str_mv http://lattes.cnpq.br/0238117059121875
dc.contributor.author.fl_str_mv Farias, Rafael Riera de
contributor_str_mv Oliveira, Ricardo Brandão de
Petriz, João Luiz Fernandes
Borges, Juliana Pereira
dc.subject.eng.fl_str_mv Isquemic
Metaborreflex
Restrict blood flow
topic Isquemic
Metaborreflex
Restrict blood flow
Exercícios físicos Aspectos fisiológicos
Fluxo sanguíneo
Isquemia
Metaborreflexo
Restrição de fluxo
CNPQ::CIENCIAS DA SAUDE::EDUCACAO FISICA
dc.subject.por.fl_str_mv Exercícios físicos Aspectos fisiológicos
Fluxo sanguíneo
Isquemia
Metaborreflexo
Restrição de fluxo
dc.subject.cnpq.fl_str_mv CNPQ::CIENCIAS DA SAUDE::EDUCACAO FISICA
description Ischemic training (IT) has been proposed as a tool to induce muscle hypertrophy, but its safety remains controversial as it may cause mean blood pressure (MBP) increments due to the activation of the muscle metaboreflex (MM). However, IT also causes metabolites accumulation that in turn may desensitise type III and IV nerve endings, which are thought to trigger the MM1. Then, we hypothesised that a period of IT would result in a blunted hemodynamic activation during the MM. In order to evaluate the effect of IT on heart rate (HR), ventricular filling time, systolic volume ratio / left ventricular ejection time, MAP, systolic volume (SV), cardiac output (CO), and peripheral vascular resistance (PVR) to the activation of MM in healthy youngsters. 17 young healthy male (age 21±2 yrs) took part in this study. Hemodynamics during the MM was obtained by the method of the post-exercise muscle ischemia2 at baseline (T0) and after one month (T1) of dynamic IT (handgrip), conducted at 30% of maximum voluntary contraction in the dominant arm with circulatory occlusion, which was obtained with a pressure of 50 mmHg above systolic blood pressure. IT was applied for 3 days/week. Hemodynamic measurements were assessed by means of impedance cardiograph, which has been commonly employed in resting and exercising subjects. The main results were that none of the studied parameters changed in response to MM after IT. In detail, MBP response was +4.09±3.87 vs. +2.23±4.65 mmHg at T0 and T1 respectively (p>0.05). Similarly, there was no difference in HR (-3.47±9.26 vs 0.81±9.96 bpm), SV (+11.3±20.2 vs. +2.28±13.07 mL), CO (+349±1643.4 vs. +57.2±801.9 mL*l-1), SVR (-14.6±201.6 vs. +5.59±104.9 dynes·s-1·cm-5) and VFR ( 5,8 +/- 2,8 vs 9,3+/- 3,3 ml/s). Contrary to initial hypothesis, this investigation provides evidence that a period of 4 weeks of IT is not able to change the hemodynamic response to metaboreflex activation in young healthy male subjects. Thus, the IT protocol employed in the present investigation was not able to desensitise type III and IV nerve endings.
publishDate 2017
dc.date.issued.fl_str_mv 2017-06-29
dc.date.available.fl_str_mv 2018-07-26
dc.date.accessioned.fl_str_mv 2021-01-05T18:51:02Z
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dc.publisher.department.fl_str_mv Centro de Educação e Humanidades::Instituto de Educação Física e Desporto
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