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dc.creatorMoncada Jiménez, José
dc.creatorPlaisance, Eric Paul
dc.creatorMestek, Michael L.
dc.creatorRatcliff, Lance
dc.creatorAraya Ramírez, Felipe
dc.creatorTaylor, James K.
dc.creatorGrandjean, Peter Walter
dc.creatorAragón Vargas, Luis Fernando
dc.date.accessioned2018-09-17T21:50:44Z
dc.date.available2018-09-17T21:50:44Z
dc.date.issued2009-02
dc.identifier.citationhttps://journals.humankinetics.com/doi/abs/10.1123/ijsnem.19.1.47es_ES
dc.identifier.issn1543-2742
dc.identifier.urihttp://hdl.handle.net/10669/75844
dc.description.abstractPurpose: This study investigated the effects of short-term dietary changes on metabolism and duathlon performance. Methods: Eleven men underwent a high-fat (HF; >65% fat from energy) or a high-carbohydrate (CHO; HC) diet (>60% CHO from energy). Energy intake was individualized, and commercially available foods were prepared and packaged for each participant 48 hr before they completed a laboratory-based duathlon (5-km run, 30 km cycling, and 10-km run). Blood samples were obtained before, immediately after, and 1 and 2 hr after the duathlon for determination of glucose, insulin, and glucagon. Oxygen consumption, ratings of perceived exertion (RPE), and respiratory-exchange ratio were assessed, and fat and CHO oxidation were estimated before, during, and after the duathlon. Results: Dietary records indicated a significant difference in fat content ingested before the duathlons (p < .05). Time to complete the duathlon did not differ between the HC- and the HF-diet trials. CHO-oxidation rate was higher during the HC-diet trial than during the HF-diet trial (p = .006). Fat-oxidation rates were higher in the HF-diet trial than in the HC-diet trial (p = .001). No differences in RPE were found between dietary trials. Blood glucose concentration was higher immediately after the duathlon in the HC-diet trial than in the HF-diet trial and remained higher 1 and 2 hr after the duathlon (p < .05). Conclusion: Duathlon performance was not altered by short-term changes in dietary fat or CHO composition despite higher blood glucose concentrations under the HC condition.es_ES
dc.language.isoen_USes_ES
dc.sourceInternational Journal of Sport Nutrition and Exercise Metabolism, vol.19(2), pp. 47-60es_ES
dc.subjectdietary manipulationes_ES
dc.subjectEndurance exercisees_ES
dc.subjectMetabolismes_ES
dc.subjectGlycogen loadinges_ES
dc.subjectFat loadinges_ES
dc.subjectManipulación de la dietaes_ES
dc.subjectEjercicio de resistenciaes_ES
dc.subjectCarga de glucógenoes_ES
dc.subjectCarga de grasaes_ES
dc.subject796.04 Clases generales de deportes y de juegoses_ES
dc.titleDuathlon performance unaltered by short-term changes in dietary fat and carbohydrateses_ES
dc.typeinfo:eu-repo/semantics/articlees_ES
dc.identifier.doi10.1123/ijsnem.19.1.47
dc.description.procedenceUCR::Vicerrectoría de Investigación::Sistema de Estudios de Posgrado::Interdisciplinarias::Doctorado Académico en Cienciases_ES
dc.description.procedenceUCR::Vicerrectoría de Docencia::Ciencias Sociales::Facultad de Educación::Escuela de Educación Físicaes_ES


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