Differences in Metabolic Stress Using a Breathing Restrictive Mask Compared to Hypobaric Hypoxia During Cycling at a Matched Workload
Differences in Metabolic Stress Using a Breathing Restrictive Mask Compared to Hypobaric Hypoxia During Cycling at a Matched Workload
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在匹配的工作负荷下骑行期间，使用呼吸限制面罩与低压缺氧相比，代谢压力的差异
DOI：
10.1007/s42978-021-00116-2
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发表时间：
2021
期刊：
影响因子：
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通讯作者：
C. Mermier
中科院分区：
文献类型：
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作者：
Bryanne N. Bellovary;Andrew Wells;Zachary J. Fennel;J. Houck;Desmond J. Millender;Kelsey Bourbeau;C. Mermier
目的：采用急性和训练方案评估了抬高训练面罩（ETM）对运动表现的影响。虽然消费者可以广泛使用ETM，但很少有研究验证ETM掩码设置。因此，本研究的目的是比较运动时ETM面罩设置对中度低压缺氧的生理反应。方法9名生活在中等海拔（1600-1650 m）的参与者休息（10 min），并按随机顺序在模拟2743 m （ALT）的低压缺氧、模拟1829 m的低压缺氧、ETM设置为914 m （ALT + ETM）和ETM设置为2743 m （ETM）中循环。参与者在基线高度以60%的最大耗氧量（VO2max）骑行20分钟。在每次测试中测量氧气消耗。结果静息状态下各组间无明显差异。重复测量方差分析显示，ALT组诱发的vo2显著高于ETM组，基线海拔下的vo2最大值为60% （P< 0.05）。结论在匹配负荷下骑行时，ALT条件下的运动vo2高于ETM面罩设置2743 m时的运动vo2， ETM条件下的运动vo2接近基线高度60%的最大vo2。本研究的结果表明，与低压缺氧相比，在中等海拔地区生活的个体在稳态运动中，ETM不会产生额外的代谢应激。
PurposeThe Elevation Training Mask (ETM) has been assessed for its impact on exercise performance using acute and training protocols. Although the ETM is widely available to consumers, little research exists for validation of the ETM mask settings. Therefore, the purpose of this study was to compare physiological responses during exercise for the ETM mask settings against moderate hypobaric hypoxia.MethodsNine participants living at moderate altitude (1600–1650 m) rested (10 min) and cycled in hypobaric hypoxia simulating 2743 m (ALT), in hypobaric hypoxia simulating 1829 m with the ETM set to 914 m (ALT + ETM), and with the ETM set to 2743 m (ETM) in a randomized order. Participants cycled for 20 min at 60% VO2maxas determined by a maximal exertion test (VO2max) at baseline altitude. Oxygen consumption was measured throughout each test.ResultsThere were no differences between conditions at rest. Repeated measures ANOVA showed the ALT condition elicited significantly greater VO2compared to the ETM condition and 60% VO2maxat baseline altitude (P< 0.05).ConclusionWhen cycling at a matched workload, the exercising VO2was higher in the ALT condition than at the ETM mask setting of 2743 m and exercising VO2during the ETM condition was similar to 60% VO2maxat baseline altitude. The results of this study indicate that the ETM did not produce additional metabolic stress compared to hypobaric hypoxia during steady-state exercise in moderate-altitude living individuals.