Changes in Serum Free Amino Acids and Muscle Fatigue Experienced during a Half-Ironman Triathlon.

The aim of this study was to investigate the relationship between changes in serum free amino acids, muscle fatigue and exercise-induced muscle damage during a half-ironman triathlon. Twenty-six experienced triathletes (age = 37.0 ± 6.8 yr; experience = 7.4 ± 3.0 yr) competed in a real half-ironman...

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Autores: Areces , Francisco, González , Cristina, Lara , Beatriz, Gallo , César, Ruíz Vicente, Diana, del Coso , Juan, Salinero Martín, Juan José, Abián Vicén, Javier
Tipo de recurso: artículo
Fecha de publicación:2015
País:España
Institución:Universidad de Castilla-La Mancha
Repositorio:RUIdeRA. Repositorio Institucional de la UCLM
OAI Identifier:oai:ruidera.uclm.es:10578/41647
Acceso en línea:https://hdl.handle.net/10578/41647
Access Level:acceso abierto
Palabra clave:Amino acids
Half-Ironman Triathlon
Muscle fatigue
Serum Free Amino Acids
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spelling Changes in Serum Free Amino Acids and Muscle Fatigue Experienced during a Half-Ironman Triathlon.Areces , FranciscoGonzález , CristinaLara , BeatrizGallo , CésarRuíz Vicente, Dianadel Coso , JuanSalinero Martín, Juan JoséAbián Vicén, JavierAmino acidsHalf-Ironman TriathlonMuscle fatigueSerum Free Amino AcidsThe aim of this study was to investigate the relationship between changes in serum free amino acids, muscle fatigue and exercise-induced muscle damage during a half-ironman triathlon. Twenty-six experienced triathletes (age = 37.0 ± 6.8 yr; experience = 7.4 ± 3.0 yr) competed in a real half-ironman triathlon in which sector times and total race time were measured by means of chip timing. Before and after the race, a countermovement jump and a maximal isometric force test were performed, and blood samples were withdrawn to measure serum free amino acids concentrations, and serum creatine kinase levels as a blood marker of muscle damage. Total race time was 320 ± 37 min and jump height (-16.3 ± 15.2%, P < 0.001) and isometric force (-14.9 ± 9.8%; P = 0.007) were significantly reduced after the race in all participants. After the race, the serum concentration of creatine kinase increased by 368 ± 187% (P < 0.001). In contrast, the serum concentrations of essential (-27.1 ± 13.0%; P < 0.001) and non-essential amino acids (-24.4 ± 13.1%; P < 0.001) were significantly reduced after the race. The tryptophan/BCAA ratio increased by 42.7 ± 12.7% after the race. Pre-to-post changes in serum free amino acids did not correlate with muscle performance variables or post-race creatine kinase concentration. In summary, during a half-ironman triathlon, serum amino acids concentrations were reduced by > 20%. However, neither the changes in serum free amino acids nor the tryptophan/BCAA ratio were related muscle fatigue or muscle damage during the race.PLOS ONE202520252015info:eu-repo/semantics/articleapplication/pdfapplication/pdfhttps://hdl.handle.net/10578/41647reponame:RUIdeRA. Repositorio Institucional de la UCLMinstname:Universidad de Castilla-La ManchaInglésinfo:eu-repo/semantics/openAccessoai:ruidera.uclm.es:10578/416472026-05-27T07:36:41Z
dc.title.none.fl_str_mv Changes in Serum Free Amino Acids and Muscle Fatigue Experienced during a Half-Ironman Triathlon.
title Changes in Serum Free Amino Acids and Muscle Fatigue Experienced during a Half-Ironman Triathlon.
spellingShingle Changes in Serum Free Amino Acids and Muscle Fatigue Experienced during a Half-Ironman Triathlon.
Areces , Francisco
Amino acids
Half-Ironman Triathlon
Muscle fatigue
Serum Free Amino Acids
title_short Changes in Serum Free Amino Acids and Muscle Fatigue Experienced during a Half-Ironman Triathlon.
title_full Changes in Serum Free Amino Acids and Muscle Fatigue Experienced during a Half-Ironman Triathlon.
title_fullStr Changes in Serum Free Amino Acids and Muscle Fatigue Experienced during a Half-Ironman Triathlon.
title_full_unstemmed Changes in Serum Free Amino Acids and Muscle Fatigue Experienced during a Half-Ironman Triathlon.
title_sort Changes in Serum Free Amino Acids and Muscle Fatigue Experienced during a Half-Ironman Triathlon.
dc.creator.none.fl_str_mv Areces , Francisco
González , Cristina
Lara , Beatriz
Gallo , César
Ruíz Vicente, Diana
del Coso , Juan
Salinero Martín, Juan José
Abián Vicén, Javier
author Areces , Francisco
author_facet Areces , Francisco
González , Cristina
Lara , Beatriz
Gallo , César
Ruíz Vicente, Diana
del Coso , Juan
Salinero Martín, Juan José
Abián Vicén, Javier
author_role author
author2 González , Cristina
Lara , Beatriz
Gallo , César
Ruíz Vicente, Diana
del Coso , Juan
Salinero Martín, Juan José
Abián Vicén, Javier
author2_role author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Amino acids
Half-Ironman Triathlon
Muscle fatigue
Serum Free Amino Acids
topic Amino acids
Half-Ironman Triathlon
Muscle fatigue
Serum Free Amino Acids
description The aim of this study was to investigate the relationship between changes in serum free amino acids, muscle fatigue and exercise-induced muscle damage during a half-ironman triathlon. Twenty-six experienced triathletes (age = 37.0 ± 6.8 yr; experience = 7.4 ± 3.0 yr) competed in a real half-ironman triathlon in which sector times and total race time were measured by means of chip timing. Before and after the race, a countermovement jump and a maximal isometric force test were performed, and blood samples were withdrawn to measure serum free amino acids concentrations, and serum creatine kinase levels as a blood marker of muscle damage. Total race time was 320 ± 37 min and jump height (-16.3 ± 15.2%, P < 0.001) and isometric force (-14.9 ± 9.8%; P = 0.007) were significantly reduced after the race in all participants. After the race, the serum concentration of creatine kinase increased by 368 ± 187% (P < 0.001). In contrast, the serum concentrations of essential (-27.1 ± 13.0%; P < 0.001) and non-essential amino acids (-24.4 ± 13.1%; P < 0.001) were significantly reduced after the race. The tryptophan/BCAA ratio increased by 42.7 ± 12.7% after the race. Pre-to-post changes in serum free amino acids did not correlate with muscle performance variables or post-race creatine kinase concentration. In summary, during a half-ironman triathlon, serum amino acids concentrations were reduced by > 20%. However, neither the changes in serum free amino acids nor the tryptophan/BCAA ratio were related muscle fatigue or muscle damage during the race.
publishDate 2015
dc.date.none.fl_str_mv 2015
2025
2025
dc.type.none.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/10578/41647
url https://hdl.handle.net/10578/41647
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv PLOS ONE
publisher.none.fl_str_mv PLOS ONE
dc.source.none.fl_str_mv reponame:RUIdeRA. Repositorio Institucional de la UCLM
instname:Universidad de Castilla-La Mancha
instname_str Universidad de Castilla-La Mancha
reponame_str RUIdeRA. Repositorio Institucional de la UCLM
collection RUIdeRA. Repositorio Institucional de la UCLM
repository.name.fl_str_mv
repository.mail.fl_str_mv
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