Re-examination of the contribution of substrates to energy expenditure during high-intensity intermittent exercise in endurance athletes

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dc.contributor.authorAslankeser, Zubeyde
dc.contributor.authorBalci, Sukru Serdar
dc.date.accessioned2020-03-26T19:42:28Z
dc.date.available2020-03-26T19:42:28Z
dc.date.issued2017
dc.departmentSelçuk Üniversitesien_US
dc.description.abstractBackground. It has been believed that the contribution of fat oxidation to total energy expenditure is becoming negligible at higher exercise intensities (about 85% VO2max). The aim of the present study was to examine the changes in substrate oxidation during high-intensity interval exercise in young adult men. Methods. A total of 18 healthy well-trained (aged 19.60 +/- 0.54 years, BMI = 22.19 +/- 0.64 kg/m(2), n = 10) and untrained (aged 20.25 +/- 0.41 years, BMI = 22.78 +/- 0.38 kg/m(2), n = 8) young men volunteered to participate in this study. After an overnight fast, subjects were tested on a cycle ergometer and completed six 4-min bouts of cycling (at similar to 80% VO2max) with 2 min of rests between intervals. Energy expenditure and the substrate oxidation rate were measured during the experiment by using indirect calorimetry. The blood lactate concentration was collected immediately after each interval workout. Results. The fat oxidation rate during each workout was significantly different between the untrained and the athlete groups (p < 0.05), and the carbohydrate (CHO) oxidation rate during the experiment was similar between groups (p > 0.05). Moreover, lactate concentration significantly increased in the untrained group (p < 0.05), whereas it did not significantly change in the athlete group during the workouts (p > 0.05). Fat contribution to energy expenditure was significantly higher in the athlete group (similar to 25%) than in the untrained group (similar to 2%). Conclusions. The present study indicates that 17 times more fat oxidation was measured in the athlete group compared to the untrained group. However, the athletes had the same CHO oxidation rate as the recreationally active subjects during high-intensity intermittent exercise. Higher fat oxidation rate despite the same CHO oxidation rate may be related to higher performance in the trained group.en_US
dc.description.sponsorshipSelcuk University (S.U.-BAP)Selcuk University [16401135]en_US
dc.description.sponsorshipThe study was supported by Selcuk University, Scientific Research Projects (S.U.-BAP Project No. 16401135). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.en_US
dc.identifier.doi10.7717/peerj.3769en_US
dc.identifier.issn2167-8359en_US
dc.identifier.pmid28894645en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.urihttps://dx.doi.org/10.7717/peerj.3769
dc.identifier.urihttps://hdl.handle.net/20.500.12395/35428
dc.identifier.volume5en_US
dc.identifier.wosWOS:000410078000002en_US
dc.identifier.wosqualityQ2en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.indekslendigikaynakPubMeden_US
dc.language.isoenen_US
dc.publisherPEERJ INCen_US
dc.relation.ispartofPEERJen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.selcuk20240510_oaigen_US
dc.subjectSubstrate oxidationen_US
dc.subjectHigh-intensity intermittent exerciseen_US
dc.subjectEndurance athleteen_US
dc.titleRe-examination of the contribution of substrates to energy expenditure during high-intensity intermittent exercise in endurance athletesen_US
dc.typeArticleen_US

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