Lactic acidosis, potassium, and the heart rate deflection point in professional road cyclists

The aim of this study is to determine the influence of lactic acidosis, the Bohr effect, and exercise induced hyperkalaemia on the occurrence of the heart rate deflection point (HRDP) in elite (professional) cyclists. Sixteen professional male road cyclists (mean (SD) age 26 (1) years) performed a r...

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Autores: Lucía Mulas, Alejandro, Hoyos, J., Santalla Hernández, Alfredo, Pérez Ruiz, Margarita, Carvajal, Alfredo, López Chicharro, José
Tipo de recurso: artículo
Fecha de publicación:2002
País:España
Institución:Universidad Europea (UEM)
Repositorio:ABACUS. Repositorio de Producción Científica
Idioma:inglés
OAI Identifier:oai:abacus.universidadeuropea.com:11268/5702
Acceso en línea:http://hdl.handle.net/11268/5702
Access Level:acceso abierto
Palabra clave:Condición física
Ciclismo
Medicina deportiva
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spelling Lactic acidosis, potassium, and the heart rate deflection point in professional road cyclistsLucía Mulas, AlejandroHoyos, J.Santalla Hernández, AlfredoPérez Ruiz, MargaritaCarvajal, AlfredoLópez Chicharro, JoséCondición físicaCiclismoMedicina deportivaMedicina deportivaThe aim of this study is to determine the influence of lactic acidosis, the Bohr effect, and exercise induced hyperkalaemia on the occurrence of the heart rate deflection point (HRDP) in elite (professional) cyclists. Sixteen professional male road cyclists (mean (SD) age 26 (1) years) performed a ramp test on a cycle ergometer (workload increases of 5 W/12 s, averaging 25 W/min). Heart rate (HR), gas exchange parameters, and blood variables (lactate, pH, P50 of the oxyhaemoglobin dissociation curve, and K+) were measured during the tests. A HRDP was shown in 56% of subjects at about 88% of their maximal HR (HRDP group; n = 9) but was linear in the rest (No-HRDP group; n = 7). In the HRDP group, the slope of the HR-workload regression line above the HRDP correlated inversely with levels of K+ at the maximal power output (r = -0.67; p<0.05). The HRDP phenomenon is associated, at least partly, with exercise induced hyperkalaemia.20162016-09-0520022002-01-0120022002-01-01journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articlehttp://hdl.handle.net/11268/5702reponame:ABACUS. Repositorio de Producción Científicainstname:Universidad Europea (UEM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:abacus.universidadeuropea.com:11268/57022026-06-11T12:41:27Z
dc.title.none.fl_str_mv Lactic acidosis, potassium, and the heart rate deflection point in professional road cyclists
title Lactic acidosis, potassium, and the heart rate deflection point in professional road cyclists
spellingShingle Lactic acidosis, potassium, and the heart rate deflection point in professional road cyclists
Lucía Mulas, Alejandro
Condición física
Ciclismo
Medicina deportiva
Medicina deportiva
title_short Lactic acidosis, potassium, and the heart rate deflection point in professional road cyclists
title_full Lactic acidosis, potassium, and the heart rate deflection point in professional road cyclists
title_fullStr Lactic acidosis, potassium, and the heart rate deflection point in professional road cyclists
title_full_unstemmed Lactic acidosis, potassium, and the heart rate deflection point in professional road cyclists
title_sort Lactic acidosis, potassium, and the heart rate deflection point in professional road cyclists
dc.creator.none.fl_str_mv Lucía Mulas, Alejandro
Hoyos, J.
Santalla Hernández, Alfredo
Pérez Ruiz, Margarita
Carvajal, Alfredo
López Chicharro, José
author Lucía Mulas, Alejandro
author_facet Lucía Mulas, Alejandro
Hoyos, J.
Santalla Hernández, Alfredo
Pérez Ruiz, Margarita
Carvajal, Alfredo
López Chicharro, José
author_role author
author2 Hoyos, J.
Santalla Hernández, Alfredo
Pérez Ruiz, Margarita
Carvajal, Alfredo
López Chicharro, José
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv
dc.subject.none.fl_str_mv Condición física
Ciclismo
Medicina deportiva
Medicina deportiva
topic Condición física
Ciclismo
Medicina deportiva
Medicina deportiva
description The aim of this study is to determine the influence of lactic acidosis, the Bohr effect, and exercise induced hyperkalaemia on the occurrence of the heart rate deflection point (HRDP) in elite (professional) cyclists. Sixteen professional male road cyclists (mean (SD) age 26 (1) years) performed a ramp test on a cycle ergometer (workload increases of 5 W/12 s, averaging 25 W/min). Heart rate (HR), gas exchange parameters, and blood variables (lactate, pH, P50 of the oxyhaemoglobin dissociation curve, and K+) were measured during the tests. A HRDP was shown in 56% of subjects at about 88% of their maximal HR (HRDP group; n = 9) but was linear in the rest (No-HRDP group; n = 7). In the HRDP group, the slope of the HR-workload regression line above the HRDP correlated inversely with levels of K+ at the maximal power output (r = -0.67; p<0.05). The HRDP phenomenon is associated, at least partly, with exercise induced hyperkalaemia.
publishDate 2002
dc.date.none.fl_str_mv 2002
2002-01-01
2002
2002-01-01
2016
2016-09-05
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/11268/5702
url http://hdl.handle.net/11268/5702
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.source.none.fl_str_mv reponame:ABACUS. Repositorio de Producción Científica
instname:Universidad Europea (UEM)
instname_str Universidad Europea (UEM)
reponame_str ABACUS. Repositorio de Producción Científica
collection ABACUS. Repositorio de Producción Científica
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,301603

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