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首页> 外文期刊>European journal of applied physiology >The effects of ischemic preconditioning on aerobic and anaerobic variables associated with submaximal cycling performance
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The effects of ischemic preconditioning on aerobic and anaerobic variables associated with submaximal cycling performance

机译：缺血预处理对与最大循环性能相关的有氧和无氧变量的影响

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Acute limb ischemia induced by pressure cuffs before activity (ischemic preconditioning; IPC) has been reported to improve exercise performance at maximal efforts. The purpose of this investigation was to determine the effects of IPC during a submaximal performance test in competitive amateur level cyclists. Twelve healthy, male cyclists participated in two performance tests in which they cycled at successive relative intensities of 30, 50, and 70% of their maximal power output for 5 min each. The test culminated with an intensity of 90% of their maximal power output until exhaustion. Prior to each test, subjects randomly completed a control (CON) or IPC treatment. The IPC treatment consisted of alternating 220 mmHg of pressure applied by a cuV to the proximal portion of both thighs for 3, 5 min bouts separated by 5 min of rest. In addition to performance time to exhaustion, variables associated with aerobic performance (oxygen consumption, ventilation, respiratory exchange ratio, heart rate, and blood lactate) were measured continuously throughout the performance test. Statistical comparisons of data were made with repeated measures analyses of variance or paired T tests and significance was accepted as P < 0.05. Heart rate at the 30% relative intensity was significantly higher for the IPC treatment, but there were no other statistically significant differences between the control and IPC treatments across all variables and relative intensities. In this group of competitive amateur-level cyclists, an acute treatment of IPC did not improve performance at each submaximal intensity or increase time to exhaustion.
机译：据报道，活动前用压力袖带诱发的急性肢体缺血（缺血预处理）可最大程度地改善运动表现。这项研究的目的是确定IPC在业余业余水平骑行者的次最大性能测试中的影响。十二名健康的男性自行车运动员参加了两项性能测试，其中，他们分别以最大功率输出的30％，50％和70％的相对强度连续骑行5分钟。测试以达到最大功率输出强度的90％结束，直到耗尽为止。在每次测试之前，受试者随机完成对照（CON）或IPC治疗。 IPC处理由cuV交替施加220 mmHg压力至大腿的近端部分，持续3分钟，5分钟，其余5分钟休息。除了进行力竭的时间外，在整个性能测试中还连续测量与有氧运动相关的变量（耗氧量，通气量，呼吸交换率，心率和血液乳酸）。数据的统计比较是通过对方差或成对的T检验进行重复测量分析而得出的，显着性为P <0.05。 IPC治疗在相对强度为30％时的心率明显更高，但是在所有变量和相对强度下，对照和IPC治疗之间在统计学上没有其他显着差异。在这组具有竞争力的业余水平骑自行车者中，对IPC的急性治疗并不能改善每个次最大强度下的表现，也不会增加筋疲力尽的时间。

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