Kate Hamilton, Andrew E Kilding, Daniel J Plews, Mathew J Mildenhall, Mark Waldron, Thanchanok Charoensap, Tobias H Cox, Matthew J Brick, Warren B Leigh, Ed Maunder
{"title":"中等强度向高强度过渡的持久性与长时间运动对高强度表现的影响有关。","authors":"Kate Hamilton, Andrew E Kilding, Daniel J Plews, Mathew J Mildenhall, Mark Waldron, Thanchanok Charoensap, Tobias H Cox, Matthew J Brick, Warren B Leigh, Ed Maunder","doi":"10.1007/s00421-024-05459-6","DOIUrl":null,"url":null,"abstract":"<p><strong>Purpose: </strong>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.</p><p><strong>Methods: </strong>On separate days, 13 well-trained cyclists and triathletes (V̇O<sub>2</sub>peak, 57.3 ± 4.8 mL kg<sup>-1</sup> min<sup>-1</sup>; training volume, 12 ± 2.1 h week<sup>-1</sup>) undertook an incremental test and 5-min time trial (TT) to determine power output at the first ventilatory threshold (VT<sub>1</sub>) and severe-intensity performance, with and without 150-min of prior moderate-intensity cycling. A single resting vastus lateralis microbiopsy was obtained.</p><p><strong>Results: </strong>Prolonged exercise reduced power output at VT<sub>1</sub> (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 VT<sub>1</sub> (r<sub>s</sub> = 0.719, P = 0.007). Durability of VT<sub>1</sub> was not related to vastus lateralis carnosine content, citrate synthase activity, or complex I activity (P > 0.05).</p><p><strong>Conclusion: </strong>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.</p>","PeriodicalId":12005,"journal":{"name":"European Journal of Applied Physiology","volume":null,"pages":null},"PeriodicalIF":2.8000,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11322397/pdf/","citationCount":"0","resultStr":"{\"title\":\"Durability of the moderate-to-heavy-intensity transition is related to the effects of prolonged exercise on severe-intensity performance.\",\"authors\":\"Kate Hamilton, Andrew E Kilding, Daniel J Plews, Mathew J Mildenhall, Mark Waldron, Thanchanok Charoensap, Tobias H Cox, Matthew J Brick, Warren B Leigh, Ed Maunder\",\"doi\":\"10.1007/s00421-024-05459-6\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><strong>Purpose: </strong>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.</p><p><strong>Methods: </strong>On separate days, 13 well-trained cyclists and triathletes (V̇O<sub>2</sub>peak, 57.3 ± 4.8 mL kg<sup>-1</sup> min<sup>-1</sup>; training volume, 12 ± 2.1 h week<sup>-1</sup>) undertook an incremental test and 5-min time trial (TT) to determine power output at the first ventilatory threshold (VT<sub>1</sub>) and severe-intensity performance, with and without 150-min of prior moderate-intensity cycling. A single resting vastus lateralis microbiopsy was obtained.</p><p><strong>Results: </strong>Prolonged exercise reduced power output at VT<sub>1</sub> (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 VT<sub>1</sub> (r<sub>s</sub> = 0.719, P = 0.007). Durability of VT<sub>1</sub> was not related to vastus lateralis carnosine content, citrate synthase activity, or complex I activity (P > 0.05).</p><p><strong>Conclusion: </strong>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.</p>\",\"PeriodicalId\":12005,\"journal\":{\"name\":\"European Journal of Applied Physiology\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":2.8000,\"publicationDate\":\"2024-08-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11322397/pdf/\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"European Journal of Applied Physiology\",\"FirstCategoryId\":\"3\",\"ListUrlMain\":\"https://doi.org/10.1007/s00421-024-05459-6\",\"RegionNum\":3,\"RegionCategory\":\"医学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"2024/3/28 0:00:00\",\"PubModel\":\"Epub\",\"JCR\":\"Q2\",\"JCRName\":\"PHYSIOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"European Journal of Applied Physiology","FirstCategoryId":"3","ListUrlMain":"https://doi.org/10.1007/s00421-024-05459-6","RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2024/3/28 0:00:00","PubModel":"Epub","JCR":"Q2","JCRName":"PHYSIOLOGY","Score":null,"Total":0}
Durability of the moderate-to-heavy-intensity transition is related to the effects of prolonged exercise on severe-intensity performance.
Purpose: 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.
期刊介绍：
The European Journal of Applied Physiology (EJAP) aims to promote mechanistic advances in human integrative and translational physiology. Physiology is viewed broadly, having overlapping context with related disciplines such as biomechanics, biochemistry, endocrinology, ergonomics, immunology, motor control, and nutrition. EJAP welcomes studies dealing with physical exercise, training and performance. Studies addressing physiological mechanisms are preferred over descriptive studies. Papers dealing with animal models or pathophysiological conditions are not excluded from consideration, but must be clearly relevant to human physiology.
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