Effect of carbohydrate availability on time to exhaustion in exercise performed at two different intensities

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MetadadosDescriçãoIdioma
Autor(es): dc.creatorSilva, Adriano Eduardo Lima da-
Autor(es): dc.creatorOliveira, Fernando Roberto de-
Autor(es): dc.creatorNakamura, Fábio Yuso-
Autor(es): dc.creatorGevaerd, Monique da Silva-
Data de aceite: dc.date.accessioned2026-02-09T12:33:20Z-
Data de disponibilização: dc.date.available2026-02-09T12:33:20Z-
Data de envio: dc.date.issued2018-04-25-
Data de envio: dc.date.issued2018-04-25-
Data de envio: dc.date.issued2009-
Fonte completa do material: dc.identifierhttps://repositorio.ufla.br/handle/1/29092-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/1163649-
Descrição: dc.descriptionThis study examined the effects of pre-exercise carbohydrate availability on the time to exhaustion for moderate and heavy exercise. Seven men participated in a randomized order in two diet and exercise regimens each lasting 3 days with a 1-week interval for washout. The tests were performed at 50% of the difference between the first (LT1) and second (LT2) lactate breakpoint for moderate exercise (below LT2) and at 25% of the difference between the maximal load and LT2 for heavy exercise (above LT2) until exhaustion. Forty-eight hours before each experimental session, subjects performed a 90-min cycling exercise followed by 5-min rest periods and a subsequent 1-min cycling bout at 125% VO2max/1-min rest periods until exhaustion to deplete muscle glycogen. A diet providing 10% (CHOlow) or 65% (CHOmod) energy as carbohydrates was consumed for 2 days until the day of the experimental test. In the exercise below LT2, time to exhaustion did not differ between the CHOmod and the CHOlow diets (57.22 ± 24.24 vs 57.16 ± 25.24 min). In the exercise above LT2, time to exhaustion decreased significantly from 23.16 ± 8.76 min on the CHOmod diet to 18.30 ± 5.86 min on the CHOlow diet (P < 0.05). The rate of carbohydrate oxidation, respiratory exchange ratio and blood lactate concentration were reduced for CHOlow only during exercise above LT2. These results suggest that muscle glycogen depletion followed by a period of a low carbohydrate diet impairs high-intensity exercise performance.-
Formato: dc.formatapplication/pdf-
Idioma: dc.languageen-
Publicador: dc.publisherAssociação Brasileira de Divulgação Científica-
Direitos: dc.rightsAttribution 4.0 International-
Direitos: dc.rightsAttribution 4.0 International-
Direitos: dc.rightsacesso aberto-
Direitos: dc.rightshttp://creativecommons.org/licenses/by/4.0/-
Direitos: dc.rightshttp://creativecommons.org/licenses/by/4.0/-
???dc.source???: dc.sourceBrazilian Journal of Medical and Biological Research-
Palavras-chave: dc.subjectTime to exhaustion-
Palavras-chave: dc.subjectMuscle glycogen-
Palavras-chave: dc.subjectMetabolism-
Palavras-chave: dc.subjectLactate thresholds-
Título: dc.titleEffect of carbohydrate availability on time to exhaustion in exercise performed at two different intensities-
Tipo de arquivo: dc.typeArtigo-
Aparece nas coleções:Repositório Institucional da Universidade Federal de Lavras (RIUFLA)

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