Power Output at the Moderate-to-Heavy Intensity Transition Decreases in a Non-Linear Fashion During Prolonged Exercise

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aut.relation.endpage2364
aut.relation.issue8
aut.relation.journalEuropean Journal of Applied Physiology
aut.relation.startpage2353
aut.relation.volume124
dc.contributor.authorGallo, Gabriele
dc.contributor.authorFaelli, Emanuela Luisa
dc.contributor.authorRuggeri, Piero
dc.contributor.authorFilipas, Luca
dc.contributor.authorCodella, Roberto
dc.contributor.authorPlews, Daniel J
dc.contributor.authorMaunder, Ed
dc.date.accessioned2024-11-12T01:46:42Z
dc.date.available2024-11-12T01:46:42Z
dc.date.issued2024-03-14
dc.description.abstractPurpose: The aims of this study were to: (i) describe the time course of the decrease in power output at the moderate-to-heavy intensity transition during prolonged exercise; (ii) investigate the association between durability of the moderate-to-heavy intensity transition and exercise capacity; and (iii) explore physiological correlates of durability of the moderate-to-heavy intensity transition. Methods: Twelve trained cyclists (age: 40 ± 8 y, V˙O2peak: 52.3 ± 5.2 mL·min−1·kg−1) performed an exhaustive cycling protocol involving alternating incremental exercise tests to determine power output at the moderate-to-heavy intensity transition via the first ventilatory threshold (VT1), and 30-min bouts at 90% of the power output at the previously estimated VT1 in the rested state. The individual time course of VT1 was modelled using linear and second-order polynomial functions, and time to a 5% decrease in VT1 (Δ5%VT1) was estimated using the best-fitting model. Results: Power output at VT1 decreased according to a second-order polynomial function in 11 of 12 participants. Time-to-task failure (234 ± 66 min) was correlated with Δ5%VT1 (139 ± 78 min, rs = 0.676, p = 0.016), and these were strongly correlated with absolute and relative rates of fat oxidation at specific exercise intensities measured during the incremental test performed in the rested state. Conclusions: These data: (i) identify a non-linear time course of decreases in the moderate-to-heavy intensity transition during prolonged exercise; (ii) support the importance of durability of the moderate-to-heavy intensity transition in prolonged exercise capacity; and (iii) suggest durability of the moderate-to-heavy intensity transition is related to fat oxidation rates.
dc.identifier.citationEuropean Journal of Applied Physiology, ISSN: 1439-6319 (Print); 1439-6327 (Online), Springer Science and Business Media LLC, 124(8), 2353-2364. doi: 10.1007/s00421-024-05440-3
dc.identifier.doi10.1007/s00421-024-05440-3
dc.identifier.issn1439-6319
dc.identifier.issn1439-6327
dc.identifier.urihttp://hdl.handle.net/10292/18290
dc.languageen
dc.publisherSpringer Science and Business Media LLC
dc.relation.urihttps://link.springer.com/article/10.1007/s00421-024-05440-3
dc.rightsOpen Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
dc.rights.accessrightsOpenAccess
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectCycling
dc.subjectDurability
dc.subjectMetabolism
dc.subjectThresholds
dc.subject42 Health Sciences
dc.subject4207 Sports Science and Exercise
dc.subjectPrevention
dc.subject6.7 Physical
dc.subject1106 Human Movement and Sports Sciences
dc.subjectSport Sciences
dc.subject3202 Clinical sciences
dc.subject3208 Medical physiology
dc.subject4207 Sports science and exercise
dc.subject.meshHumans
dc.subject.meshAdult
dc.subject.meshMale
dc.subject.meshOxygen Consumption
dc.subject.meshExercise
dc.subject.meshBicycling
dc.subject.meshExercise Test
dc.subject.meshMiddle Aged
dc.subject.meshPhysical Endurance
dc.subject.meshHumans
dc.subject.meshExercise Test
dc.subject.meshExercise
dc.subject.meshOxygen Consumption
dc.subject.meshPhysical Endurance
dc.subject.meshBicycling
dc.subject.meshAdult
dc.subject.meshMiddle Aged
dc.subject.meshMale
dc.subject.meshHumans
dc.subject.meshAdult
dc.subject.meshMale
dc.subject.meshOxygen Consumption
dc.subject.meshExercise
dc.subject.meshBicycling
dc.subject.meshExercise Test
dc.subject.meshMiddle Aged
dc.subject.meshPhysical Endurance
dc.titlePower Output at the Moderate-to-Heavy Intensity Transition Decreases in a Non-Linear Fashion During Prolonged Exercise
dc.typeJournal Article
pubs.elements-id541892
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