Effects of respiratory muscle training versus placebo on endurance exercise performance
Effects of respiratory muscle training versus placebo on endurance exercise performance
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DOI：
10.1016/s0034-5687(01)00250-x
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发表时间：
2001-09-01
期刊：
影响因子：
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通讯作者：
Dempsey, JA
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文献类型：
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作者：
Sonetti, DA;Wetter, TJ;Dempsey, JA
我们评估了 5 周（25 次会议）的效果； （每天 30-35 分钟，每周 5 天），针对 9 名竞技男性自行车运动员的呼吸肌训练 (RMT) 计划。实验设计包括吸气阻力力量训练（3-5 分钟/次）和呼吸过度耐力训练（30 分钟/次）、使用假缺氧训练器的安慰剂组（n = 8）以及三项运动表现测试，包括高度可重复的 8 公里计时试验。 RMT 强度（每周测量一次，根据累积吸气压和可持续呼吸过度水平）在 5 周后显着增加（分别为 + 64% 和 + 19%）。 RMT 组的最大吸气压显着增加了 8%（P < 0.05），而安慰剂组仅增加了 3.7%（P > 0.10）。 RMT 组和安慰剂组均显示固定工作率耐力测试表现时间（分别 + 26% 和 + 16%）以及增量最大耗氧量（V over dot(O2) max）测试期间达到的峰值工作率（+ 9 和 + 6%）显着增加。 RMT 组的 8 公里计时赛成绩提高了 1.8 +/- 1.2%（或 15 +/- 10 分；P < 0.01），9 名受试者中有 8 名成绩有所提高；安慰剂组的 8 名受试者中有 5 名出现了可变的非显着变化（- 0.3 +/- 2.7%，P = 0.07）。然而，在这三项性能测试中观察到的变化在 RMT 组和安慰剂组之间没有显着差异。在增量运动测试期间相同的工作速率或固定工作速率耐力测试期间相同的时间下，两组的这些运动试验中的心率、通气量或静脉血乳酸均没有显着变化。我们认为，RMT 对训练有素的自行车运动员运动表现的影响不会超过安慰剂组。在使用性能测试的实验设计中，必须考虑到显着的安慰剂和测试熟悉效应，这些性能测试严重依赖于意志努力。 (C) 2001 年爱思唯尔科学 BN。版权所有。
We evaluated the effects of a 5 week (25 sessions); (30-35 min/day, 5 days/week), respiratory muscle training (RMT) program in nine competitive male cyclists. The experimental design included inspiratory resistance strength training (3-5 min/session) and hyperpnea endurance training (30 min/session), a placebo group which used a sham hypoxic trainer (n = 8), and three exercise performance tests, including a highly reproducible 8 km time trial test. RMT intensity, measured once a week in terms of accumulated inspiratory pressure and the level of sustainable hyperpnea increased significantly after 5 weeks (+ 64% and + 19%, respectively). The RMT group showed a significant 8% increase in maximal inspiratory pressure (P < 0.05) while the placebo group showed only a 3.7% increase (P > 0.10). RMT and placebo groups both showed significant increases in the fixed work-rate endurance test performance time (+ 26% and + 16%, respectively) and in the peak work-rate achieved during the incremental maximal oxygen consumption (V over dot(O2) max) test (+ 9 and + 6%). The 8 km time trial performance increased 1.8 +/- 1.2% (or 15 +/- 10 see; P < 0.01) in the RMT group with 8 of 9 subjects increasing; the placebo group showed a variable non-significant change in 5 of 8 subjects (- 0.3 +/- 2.7%, P = 0.07). The changes observed in these three performance tests were not, however, significantly different between the RMT and placebo groups. Heart rate, ventilation, or venous blood lactate, at equal work-rates during the incremental exercise test or at equal times during the fixed work-rate endurance test were not changed significantly across these exercise trials in either group. We propose that the effect of RMT on exercise performance in highly trained cyclists does not exceed that in a placebo group. Significant placebo and test familiarization effects must be accounted for in experimental designs utilizing performance tests which are critically dependent on volitional effort. (C) 2001 Elsevier Science BN. All rights reserved.