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We assessed whetherthe seasonal training pattern of endurance athletes produces corresponding adaptations of mitochondrial, angiogenic, and myogenic processes in skeletal muscle and whether these relate to the training volume and metabolic load during exercise. Aerobic performanceand content per act...

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Autores principales:	Frese S, 2, Valdivieso P, Jaecker VC, Harms SA, Konou TM, Tappe KA, Schiffer T, Frese L, Bloch W, 6, Flück M, 7
Formato:	article
Lenguaje:	DE EN
Publicado:	Dynamic Media Sales Verlag 2016
Materias:	Sports medicine RC1200-1245
Acceso en línea:	https://doaj.org/article/8dd8607c7e2845aba8bab23b16861d12
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id	oai:doaj.org-article:8dd8607c7e2845aba8bab23b16861d12
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spelling	oai:doaj.org-article:8dd8607c7e2845aba8bab23b16861d122021-11-16T19:01:42ZSportwissenschaft0344-59252510-526410.5960/dzsm.2016.239https://doaj.org/article/8dd8607c7e2845aba8bab23b16861d122016-06-01T00:00:00Zhttps://www.germanjournalsportsmedicine.com/archive/archive-2016/issue-6/expression-of-metabolic-and-myogenic-factors-during-two-competitive-seasons-in-elite-junior-cyclists/https://doaj.org/toc/0344-5925https://doaj.org/toc/2510-5264We assessed whetherthe seasonal training pattern of endurance athletes produces corresponding adaptations of mitochondrial, angiogenic, and myogenic processes in skeletal muscle and whether these relate to the training volume and metabolic load during exercise. Aerobic performanceand content per actin of markers of mitochondrial respiration (NDUFA9, SDHA, UQCRC1, COX4AI, ATP5A1, UCP3), myogenic regulators (myogenin, myoD, tenascin-C) and MyHC were determined in m. vastus lateralis of ten male elite junior cyclists (17.30.2 years) after the preparation and competition phase over two seasons. Effects were assessed with a repeated measures ANOVA at a 5% significance level.'Energy spent in training was comparable in the preparation and competition phase of the first season (9354 and 9825 MET x min/week), despite a 14%-reduced training volume, but decreased thereafter to 6800 MET x min/week. Average mitochondrial protein content changed in anti-cyclical pattern to VO2peak, capillarisation, satellite cell and myonuclear number; being 22% and 45% higher after the preparation than the preceding competition phase in season 1 and 2. The content of tenascin-C (+34%), and myogenin (+166%), increased transiently after the second preparation phase. The findings emphasize a role of seasonal metabolic load for adjustments in muscle protein expression with training of junior cyclists and suggest that the capacity for mitochondrial biogenesis may become exhaustedat the end of the competition phase when muscle enters a regeneration program.KEY WORDS: Competition, Training, Plasticity, Molecular BiologyFrese S2Valdivieso PJaecker VCHarms SAKonou TMTappe KASchiffer TFrese LBloch W6Flück M7Dynamic Media Sales VerlagarticleSports medicineRC1200-1245DEENDeutsche Zeitschrift für Sportmedizin, Vol 67, Iss 6 (2016)
institution	DOAJ
collection	DOAJ
language	DE EN
topic	Sports medicine RC1200-1245
spellingShingle	Sports medicine RC1200-1245 Frese S 2 Valdivieso P Jaecker VC Harms SA Konou TM Tappe KA Schiffer T Frese L Bloch W 6 Flück M 7 Sportwissenschaft
description	We assessed whetherthe seasonal training pattern of endurance athletes produces corresponding adaptations of mitochondrial, angiogenic, and myogenic processes in skeletal muscle and whether these relate to the training volume and metabolic load during exercise. Aerobic performanceand content per actin of markers of mitochondrial respiration (NDUFA9, SDHA, UQCRC1, COX4AI, ATP5A1, UCP3), myogenic regulators (myogenin, myoD, tenascin-C) and MyHC were determined in m. vastus lateralis of ten male elite junior cyclists (17.30.2 years) after the preparation and competition phase over two seasons. Effects were assessed with a repeated measures ANOVA at a 5% significance level.'Energy spent in training was comparable in the preparation and competition phase of the first season (9354 and 9825 MET x min/week), despite a 14%-reduced training volume, but decreased thereafter to 6800 MET x min/week. Average mitochondrial protein content changed in anti-cyclical pattern to VO2peak, capillarisation, satellite cell and myonuclear number; being 22% and 45% higher after the preparation than the preceding competition phase in season 1 and 2. The content of tenascin-C (+34%), and myogenin (+166%), increased transiently after the second preparation phase. The findings emphasize a role of seasonal metabolic load for adjustments in muscle protein expression with training of junior cyclists and suggest that the capacity for mitochondrial biogenesis may become exhaustedat the end of the competition phase when muscle enters a regeneration program.KEY WORDS: Competition, Training, Plasticity, Molecular Biology
format	article
author	Frese S 2 Valdivieso P Jaecker VC Harms SA Konou TM Tappe KA Schiffer T Frese L Bloch W 6 Flück M 7
author_facet	Frese S 2 Valdivieso P Jaecker VC Harms SA Konou TM Tappe KA Schiffer T Frese L Bloch W 6 Flück M 7
author_sort	Frese S
title	Sportwissenschaft
title_short	Sportwissenschaft
title_full	Sportwissenschaft
title_fullStr	Sportwissenschaft
title_full_unstemmed	Sportwissenschaft
title_sort	sportwissenschaft
publisher	Dynamic Media Sales Verlag
publishDate	2016
url	https://doaj.org/article/8dd8607c7e2845aba8bab23b16861d12
work_keys_str_mv	AT freses sportwissenschaft AT 2 sportwissenschaft AT valdiviesop sportwissenschaft AT jaeckervc sportwissenschaft AT harmssa sportwissenschaft AT konoutm sportwissenschaft AT tappeka sportwissenschaft AT schiffert sportwissenschaft AT fresel sportwissenschaft AT blochw sportwissenschaft AT 6 sportwissenschaft AT fluckm sportwissenschaft AT 7 sportwissenschaft
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