Durability of the Moderate-to-Heavy-Intensity Transition Is Related to the Effects of Prolonged Exercise on Severe-Intensity Performance

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aut.relation.journalEuropean Journal of Applied Physiology
dc.contributor.authorHamilton, Kate
dc.contributor.authorKilding, Andrew E
dc.contributor.authorPlews, Daniel J
dc.contributor.authorMildenhall, Mathew J
dc.contributor.authorWaldron, Mark
dc.contributor.authorCharoensap, Thanchanok
dc.contributor.authorCox, Tobias H
dc.contributor.authorBrick, Matthew J
dc.contributor.authorLeigh, Warren B
dc.contributor.authorMaunder, Ed
dc.date.accessioned2024-04-02T23:57:23Z
dc.date.available2024-04-02T23:57:23Z
dc.date.issued2024-03-28
dc.description.abstractPurpose Power output at the moderate-to-heavy-intensity transition decreases during prolonged exercise, and resilience to this has been termed ‘durability’. The purpose of this study was to assess the relationship between durability and the effect of prolonged exercise on severe-intensity performance, and explore intramuscular correlates of durability. Methods On separate days, 13 well-trained cyclists and triathletes (V̇O2peak, 57.3 ± 4.8 mL kg−1 min−1; training volume, 12 ± 2.1 h week−1) undertook an incremental test and 5-min time trial (TT) to determine power output at the first ventilatory threshold (VT1) and severe-intensity performance, with and without 150-min of prior moderate-intensity cycling. A single resting vastus lateralis microbiopsy was obtained. Results Prolonged exercise reduced power output at VT1 (211 ± 40 vs. 198 ± 39 W, ∆ -13 ± 16 W, ∆ -6 ± 7%, P = 0.013) and 5-min TT performance (333 ± 75 vs. 302 ± 63 W, ∆ -31 ± 41 W, ∆ -9 ± 10%, P = 0.017). The reduction in 5-min TT performance was significantly associated with durability of VT1 (rs = 0.719, P = 0.007). Durability of VT1 was not related to vastus lateralis carnosine content, citrate synthase activity, or complex I activity (P > 0.05). Conclusion These data provide the first direct support that durability of the moderate-to-heavy-intensity transition is an important performance parameter, as more durable athletes exhibited smaller reductions in 5-min TT performance following prolonged exercise. We did not find relationships between durability and vastus lateralis carnosine content, citrate synthase activity, or complex I activity.
dc.identifier.citationEuropean Journal of Applied Physiology, ISSN: 1439-6319 (Print); 1439-6327 (Online), Springer Science and Business Media LLC. doi: 10.1007/s00421-024-05459-6
dc.identifier.doi10.1007/s00421-024-05459-6
dc.identifier.issn1439-6319
dc.identifier.issn1439-6327
dc.identifier.urihttp://hdl.handle.net/10292/17400
dc.languageen
dc.publisherSpringer Science and Business Media LLC
dc.relation.urihttps://link.springer.com/article/10.1007/s00421-024-05459-6
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.subject1106 Human Movement and Sports Sciences
dc.subjectSport Sciences
dc.subject3202 Clinical sciences
dc.subject3208 Medical physiology
dc.subject4207 Sports science and exercise
dc.titleDurability of the Moderate-to-Heavy-Intensity Transition Is Related to the Effects of Prolonged Exercise on Severe-Intensity Performance
dc.typeJournal Article
pubs.elements-id542959
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