Heart rate variability in athletes and nonathletes at rest and during head-up tilt

Detalhes bibliográficos
Autor(a) principal: Martinelli,F.S.
Data de Publicação: 2005
Outros Autores: Chacon-Mikahil,M.P.T., Martins,L.E.B., Lima-Filho,E.C., Golfetti,R., Paschoal,M.A., Gallo-Junior,L.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Brazilian Journal of Medical and Biological Research
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2005000400019
Resumo: The purpose of the present study was to determine if autonomic heart rate modulation, indicated by heart rate variability (HRV), differs during supine rest and head-up tilt (HUT) when sedentary and endurance-trained cyclists are compared. Eleven sedentary young men (S) and 10 trained cyclists (C) were studied. The volunteers were submitted to a dynamic ECG Holter to calculate HRV at rest and during a 70º HUT. The major aerobic capacity of athletes was expressed by higher values of <img src="/img/revistas/bjmbr/v38n4/Vo.gif">at anaerobic threshold and peak conditions (P < 0.05). At rest the athletes had lower heart rates (P < 0.05) and higher values in the time domain of HRV compared with controls (SD of normal RR interval, SDNN, medians): 59.1 ms (S) vs 89.9 ms (C), P < 0.05. During tilt athletes also had higher values in the time domain of HRV compared with controls (SDNN, medians): 55.7 ms (S) vs 69.7 ms (C), P < 0.05. No differences in power spectral components of HRV at rest or during HUT were detected between groups. Based on the analysis of data by the frequency domain method, we conclude that in athletes the resting bradycardia seems to be much more related to changes in intrinsic mechanisms than to modifications in autonomic control. Also, HUT caused comparable changes in sympathetic and parasympathetic modulation of the sinus node in both groups.
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spelling Heart rate variability in athletes and nonathletes at rest and during head-up tiltEndurancePower spectral analysisHeart rate variabilityAutonomic heart rate modulationTraining bradycardiaOrthostatic stressThe purpose of the present study was to determine if autonomic heart rate modulation, indicated by heart rate variability (HRV), differs during supine rest and head-up tilt (HUT) when sedentary and endurance-trained cyclists are compared. Eleven sedentary young men (S) and 10 trained cyclists (C) were studied. The volunteers were submitted to a dynamic ECG Holter to calculate HRV at rest and during a 70º HUT. The major aerobic capacity of athletes was expressed by higher values of <img src="/img/revistas/bjmbr/v38n4/Vo.gif">at anaerobic threshold and peak conditions (P < 0.05). At rest the athletes had lower heart rates (P < 0.05) and higher values in the time domain of HRV compared with controls (SD of normal RR interval, SDNN, medians): 59.1 ms (S) vs 89.9 ms (C), P < 0.05. During tilt athletes also had higher values in the time domain of HRV compared with controls (SDNN, medians): 55.7 ms (S) vs 69.7 ms (C), P < 0.05. No differences in power spectral components of HRV at rest or during HUT were detected between groups. Based on the analysis of data by the frequency domain method, we conclude that in athletes the resting bradycardia seems to be much more related to changes in intrinsic mechanisms than to modifications in autonomic control. Also, HUT caused comparable changes in sympathetic and parasympathetic modulation of the sinus node in both groups.Associação Brasileira de Divulgação Científica2005-04-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2005000400019Brazilian Journal of Medical and Biological Research v.38 n.4 2005reponame:Brazilian Journal of Medical and Biological Researchinstname:Associação Brasileira de Divulgação Científica (ABDC)instacron:ABDC10.1590/S0100-879X2005000400019info:eu-repo/semantics/openAccessMartinelli,F.S.Chacon-Mikahil,M.P.T.Martins,L.E.B.Lima-Filho,E.C.Golfetti,R.Paschoal,M.A.Gallo-Junior,L.eng2005-04-13T00:00:00Zoai:scielo:S0100-879X2005000400019Revistahttps://www.bjournal.org/https://old.scielo.br/oai/scielo-oai.phpbjournal@terra.com.br||bjournal@terra.com.br1414-431X0100-879Xopendoar:2005-04-13T00:00Brazilian Journal of Medical and Biological Research - Associação Brasileira de Divulgação Científica (ABDC)false
dc.title.none.fl_str_mv Heart rate variability in athletes and nonathletes at rest and during head-up tilt
title Heart rate variability in athletes and nonathletes at rest and during head-up tilt
spellingShingle Heart rate variability in athletes and nonathletes at rest and during head-up tilt
Martinelli,F.S.
Endurance
Power spectral analysis
Heart rate variability
Autonomic heart rate modulation
Training bradycardia
Orthostatic stress
title_short Heart rate variability in athletes and nonathletes at rest and during head-up tilt
title_full Heart rate variability in athletes and nonathletes at rest and during head-up tilt
title_fullStr Heart rate variability in athletes and nonathletes at rest and during head-up tilt
title_full_unstemmed Heart rate variability in athletes and nonathletes at rest and during head-up tilt
title_sort Heart rate variability in athletes and nonathletes at rest and during head-up tilt
author Martinelli,F.S.
author_facet Martinelli,F.S.
Chacon-Mikahil,M.P.T.
Martins,L.E.B.
Lima-Filho,E.C.
Golfetti,R.
Paschoal,M.A.
Gallo-Junior,L.
author_role author
author2 Chacon-Mikahil,M.P.T.
Martins,L.E.B.
Lima-Filho,E.C.
Golfetti,R.
Paschoal,M.A.
Gallo-Junior,L.
author2_role author
author
author
author
author
author
dc.contributor.author.fl_str_mv Martinelli,F.S.
Chacon-Mikahil,M.P.T.
Martins,L.E.B.
Lima-Filho,E.C.
Golfetti,R.
Paschoal,M.A.
Gallo-Junior,L.
dc.subject.por.fl_str_mv Endurance
Power spectral analysis
Heart rate variability
Autonomic heart rate modulation
Training bradycardia
Orthostatic stress
topic Endurance
Power spectral analysis
Heart rate variability
Autonomic heart rate modulation
Training bradycardia
Orthostatic stress
description The purpose of the present study was to determine if autonomic heart rate modulation, indicated by heart rate variability (HRV), differs during supine rest and head-up tilt (HUT) when sedentary and endurance-trained cyclists are compared. Eleven sedentary young men (S) and 10 trained cyclists (C) were studied. The volunteers were submitted to a dynamic ECG Holter to calculate HRV at rest and during a 70º HUT. The major aerobic capacity of athletes was expressed by higher values of <img src="/img/revistas/bjmbr/v38n4/Vo.gif">at anaerobic threshold and peak conditions (P < 0.05). At rest the athletes had lower heart rates (P < 0.05) and higher values in the time domain of HRV compared with controls (SD of normal RR interval, SDNN, medians): 59.1 ms (S) vs 89.9 ms (C), P < 0.05. During tilt athletes also had higher values in the time domain of HRV compared with controls (SDNN, medians): 55.7 ms (S) vs 69.7 ms (C), P < 0.05. No differences in power spectral components of HRV at rest or during HUT were detected between groups. Based on the analysis of data by the frequency domain method, we conclude that in athletes the resting bradycardia seems to be much more related to changes in intrinsic mechanisms than to modifications in autonomic control. Also, HUT caused comparable changes in sympathetic and parasympathetic modulation of the sinus node in both groups.
publishDate 2005
dc.date.none.fl_str_mv 2005-04-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2005000400019
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2005000400019
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0100-879X2005000400019
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Associação Brasileira de Divulgação Científica
publisher.none.fl_str_mv Associação Brasileira de Divulgação Científica
dc.source.none.fl_str_mv Brazilian Journal of Medical and Biological Research v.38 n.4 2005
reponame:Brazilian Journal of Medical and Biological Research
instname:Associação Brasileira de Divulgação Científica (ABDC)
instacron:ABDC
instname_str Associação Brasileira de Divulgação Científica (ABDC)
instacron_str ABDC
institution ABDC
reponame_str Brazilian Journal of Medical and Biological Research
collection Brazilian Journal of Medical and Biological Research
repository.name.fl_str_mv Brazilian Journal of Medical and Biological Research - Associação Brasileira de Divulgação Científica (ABDC)
repository.mail.fl_str_mv bjournal@terra.com.br||bjournal@terra.com.br
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