D Bellini, C Chapman, D Peden, S P Hoekstra, R A Ferguson, C A Leicht
{"title":"缺血预处理改善上肢耐力表现，但不改变V / O2动力学。","authors":"D Bellini, C Chapman, D Peden, S P Hoekstra, R A Ferguson, C A Leicht","doi":"10.1080/17461391.2022.2103741","DOIUrl":null,"url":null,"abstract":"<p><strong>Purpose: </strong>Whilst pre-exercise ischaemic preconditioning (IPC) can improve lower-body exercise performance, its impact on upper-limb performance has received little attention. This study examines the influence of IPC on upper-body exercise performance and oxygen uptake (V̇O<sub>2</sub>) kinetics.</p><p><strong>Methods: </strong>Eleven recreationally-active males (24 ± 2 years) completed an arm-crank graded exercise test to exhaustion to determine the power outputs at the ventilatory thresholds (VT1 and VT2) and V̇O<sub>2peak</sub> (40.0 ± 7.4 ml·kg<sup>-1</sup>·min<sup>-1</sup>). Four main trials were conducted, two following IPC (4 × 5-min, 220 mmHg contralateral upper-limb occlusion), the other two following SHAM (4 × 5-min, 20 mmHg). The first two trials consisted of a 15-minute constant work rate and the last two time-to-exhaustion (TTE) arm-crank tests at the power equivalents of 95% VT1 (LOW) and VT2 (HIGH), respectively. Pulmonary V̇O<sub>2</sub> kinetics, heart rate, blood-lactate concentration, and rating of perceived exertion were recorded throughout exercise.</p><p><strong>Results: </strong>TTE during HIGH was longer following IPC than SHAM (459 ± 115 vs 395 ± 102 s, <i>p </i>= .004). Mean response time and change in V̇O<sub>2</sub> between 2-min and end exercise (ΔV̇O<sub>2</sub>) were not different between IPC and SHAM for arm-cranking at both LOW (80.3 ± 19.0 vs 90.3 ± 23.5 s [<i>p </i>= .06], 457 ± 184 vs 443 ± 245 ml [<i>p </i>= .83]) and HIGH (96.6 ± 31.2 vs 92.1 ± 24.4 s [<i>p </i>= .65], 617 ± 321 vs 649 ± 230 ml [<i>p </i>= .74]). Heart rate, blood-lactate concentration, and rating of perceived exertion did not differ between conditions (all <i>p</i> ≥ .05).</p><p><strong>Conclusion: </strong>TTE was longer following IPC during upper-body exercise despite unchanged V̇O<sub>2</sub> kinetics.<b>Highlights</b>Whilst pre-exercise ischaemic preconditioning can improve lower-body exercise performance and alter V̇O<sub>2</sub> kinetics, its impact on upper-limb performance has received little attention.An acute bout of ischaemic preconditioning prior to arm-crank ergometry exercise significantly improved time to exhaustion compared to a sham control condition.V̇O<sub>2</sub> kinetics in response to ischaemic preconditioning remained unchanged, suggesting alternative mechanisms may explain performance improvements.</p>","PeriodicalId":2,"journal":{"name":"ACS Applied Bio Materials","volume":null,"pages":null},"PeriodicalIF":4.6000,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":"{\"title\":\"Ischaemic preconditioning improves upper-body endurance performance without altering V̇O<sub>2</sub> kinetics.\",\"authors\":\"D Bellini, C Chapman, D Peden, S P Hoekstra, R A Ferguson, C A Leicht\",\"doi\":\"10.1080/17461391.2022.2103741\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><strong>Purpose: </strong>Whilst pre-exercise ischaemic preconditioning (IPC) can improve lower-body exercise performance, its impact on upper-limb performance has received little attention. This study examines the influence of IPC on upper-body exercise performance and oxygen uptake (V̇O<sub>2</sub>) kinetics.</p><p><strong>Methods: </strong>Eleven recreationally-active males (24 ± 2 years) completed an arm-crank graded exercise test to exhaustion to determine the power outputs at the ventilatory thresholds (VT1 and VT2) and V̇O<sub>2peak</sub> (40.0 ± 7.4 ml·kg<sup>-1</sup>·min<sup>-1</sup>). Four main trials were conducted, two following IPC (4 × 5-min, 220 mmHg contralateral upper-limb occlusion), the other two following SHAM (4 × 5-min, 20 mmHg). The first two trials consisted of a 15-minute constant work rate and the last two time-to-exhaustion (TTE) arm-crank tests at the power equivalents of 95% VT1 (LOW) and VT2 (HIGH), respectively. Pulmonary V̇O<sub>2</sub> kinetics, heart rate, blood-lactate concentration, and rating of perceived exertion were recorded throughout exercise.</p><p><strong>Results: </strong>TTE during HIGH was longer following IPC than SHAM (459 ± 115 vs 395 ± 102 s, <i>p </i>= .004). Mean response time and change in V̇O<sub>2</sub> between 2-min and end exercise (ΔV̇O<sub>2</sub>) were not different between IPC and SHAM for arm-cranking at both LOW (80.3 ± 19.0 vs 90.3 ± 23.5 s [<i>p </i>= .06], 457 ± 184 vs 443 ± 245 ml [<i>p </i>= .83]) and HIGH (96.6 ± 31.2 vs 92.1 ± 24.4 s [<i>p </i>= .65], 617 ± 321 vs 649 ± 230 ml [<i>p </i>= .74]). Heart rate, blood-lactate concentration, and rating of perceived exertion did not differ between conditions (all <i>p</i> ≥ .05).</p><p><strong>Conclusion: </strong>TTE was longer following IPC during upper-body exercise despite unchanged V̇O<sub>2</sub> kinetics.<b>Highlights</b>Whilst pre-exercise ischaemic preconditioning can improve lower-body exercise performance and alter V̇O<sub>2</sub> kinetics, its impact on upper-limb performance has received little attention.An acute bout of ischaemic preconditioning prior to arm-crank ergometry exercise significantly improved time to exhaustion compared to a sham control condition.V̇O<sub>2</sub> kinetics in response to ischaemic preconditioning remained unchanged, suggesting alternative mechanisms may explain performance improvements.</p>\",\"PeriodicalId\":2,\"journal\":{\"name\":\"ACS Applied Bio Materials\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":4.6000,\"publicationDate\":\"2023-08-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"1\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"ACS Applied Bio Materials\",\"FirstCategoryId\":\"3\",\"ListUrlMain\":\"https://doi.org/10.1080/17461391.2022.2103741\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"MATERIALS SCIENCE, BIOMATERIALS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"ACS Applied Bio Materials","FirstCategoryId":"3","ListUrlMain":"https://doi.org/10.1080/17461391.2022.2103741","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, BIOMATERIALS","Score":null,"Total":0}
引用次数: 1
摘要
目的:虽然运动前缺血预处理(IPC)可以改善下体运动表现，但其对上肢运动表现的影响却很少被关注。本研究探讨了IPC对上肢运动表现和氧摄取动力学的影响。方法:11例(24±2岁)从事休闲运动的男性，采用臂曲柄分级运动至疲劳试验，测定其在通气阈值(VT1和VT2)和V (o2)峰值(40.0±7.4 ml·kg-1·min-1)时的输出功率。进行了四项主要试验，两项采用IPC (4 × 5分钟，220 mmHg对侧上肢闭塞)，另外两项采用SHAM (4 × 5分钟，20 mmHg)。前两次试验包括15分钟恒定工作速率和最后两次在95% VT1 (LOW)和VT2 (HIGH)功率等效下的疲劳时间(TTE)臂曲柄试验。在整个运动过程中记录肺V / O2动力学、心率、血乳酸浓度和感觉劳累等级。结果:IPC后HIGH期TTE时间长于SHAM(459±115 s vs 395±102 s, p = 0.004)。在两种低强度下，IPC和SHAM的手臂转动平均反应时间和2分钟至运动结束时的V (O2)变化(ΔV)无差异(80.3±19.0 vs 90.3±23.5 s) [p =。]06], 457±184 vs 443±245毫升(p =())和高(96.6±31.2 vs 92.1±24.4 s [p =。[65]， 617±321 vs 649±230 ml [p = .74])。两组患者的心率、血乳酸浓度和劳累程度无显著差异(p均≥0.05)。结论:上肢运动时，尽管V氧动力学不变，但IPC后TTE延长。虽然运动前缺血预处理可以改善下体运动表现并改变V / O2动力学，但其对上肢运动表现的影响却很少受到关注。与假对照条件相比，臂曲柄几何运动前的急性缺血预处理显著改善了疲劳时间。响应缺血预处理的V / O2动力学保持不变，表明其他机制可能解释了性能的提高。
Ischaemic preconditioning improves upper-body endurance performance without altering V̇O2 kinetics.
Purpose: Whilst pre-exercise ischaemic preconditioning (IPC) can improve lower-body exercise performance, its impact on upper-limb performance has received little attention. This study examines the influence of IPC on upper-body exercise performance and oxygen uptake (V̇O2) kinetics.
Methods: Eleven recreationally-active males (24 ± 2 years) completed an arm-crank graded exercise test to exhaustion to determine the power outputs at the ventilatory thresholds (VT1 and VT2) and V̇O2peak (40.0 ± 7.4 ml·kg-1·min-1). Four main trials were conducted, two following IPC (4 × 5-min, 220 mmHg contralateral upper-limb occlusion), the other two following SHAM (4 × 5-min, 20 mmHg). The first two trials consisted of a 15-minute constant work rate and the last two time-to-exhaustion (TTE) arm-crank tests at the power equivalents of 95% VT1 (LOW) and VT2 (HIGH), respectively. Pulmonary V̇O2 kinetics, heart rate, blood-lactate concentration, and rating of perceived exertion were recorded throughout exercise.
Results: TTE during HIGH was longer following IPC than SHAM (459 ± 115 vs 395 ± 102 s, p = .004). Mean response time and change in V̇O2 between 2-min and end exercise (ΔV̇O2) were not different between IPC and SHAM for arm-cranking at both LOW (80.3 ± 19.0 vs 90.3 ± 23.5 s [p = .06], 457 ± 184 vs 443 ± 245 ml [p = .83]) and HIGH (96.6 ± 31.2 vs 92.1 ± 24.4 s [p = .65], 617 ± 321 vs 649 ± 230 ml [p = .74]). Heart rate, blood-lactate concentration, and rating of perceived exertion did not differ between conditions (all p ≥ .05).
Conclusion: TTE was longer following IPC during upper-body exercise despite unchanged V̇O2 kinetics.HighlightsWhilst pre-exercise ischaemic preconditioning can improve lower-body exercise performance and alter V̇O2 kinetics, its impact on upper-limb performance has received little attention.An acute bout of ischaemic preconditioning prior to arm-crank ergometry exercise significantly improved time to exhaustion compared to a sham control condition.V̇O2 kinetics in response to ischaemic preconditioning remained unchanged, suggesting alternative mechanisms may explain performance improvements.
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