可穿戴呼气末正压阀可改善运动表现。
Wearable positive end-expiratory pressure valve improves exercise performance.
作者信息
Crouse Stephen F, Lytle Jason R, Boutros Sean, Benton William, Moreno Michael, McCulloch Patrick C, Lambert Brad S
机构信息
Department of Health and Kinesiology, Texas A&M University, College Station, TX, USA.
My Houston Surgeons, 9230 Katy Freeway, Suite 600, Houston, TX, USA.
出版信息
Sports Med Health Sci. 2020 Jul 10;2(3):159-165. doi: 10.1016/j.smhs.2020.06.002. eCollection 2020 Sep.
We tested a PEEP (4.2 cmHO) mouthpiece (PMP) on maximal cycling performance in healthy adults. Experiment-1, PMP vs. non-PMP mouthpiece (CON) [ = 9 (5♂), Age = 30 ± 2 yr]; Experiment-2, PMP vs. no mouthpiece (NMP) [ = 10 (7♂), Age = 27 ± 1 yr]. At timepoint 1 in both experiments (mouthpiece condition randomized) subjects performed graded cycling testing (GXT) (Corival® cycle ergometer) to determine O ), Opulse ), GXT endurance time (GXT-T), and O )-at-ventilatory-threshold ( O @VT). At timepoint 2 72 h later, subjects completed a ventilatory-threshold-endurance-ride [VTER] timed to exhaustion at O @VT power . One week later at timepoints 3 and 4 (time-of-day controlled), subjects repeated testing protocols under the alternate mouthpiece condition. Selected results (paired T-test, p<0.05): Experiment 1 PMP vs. CON, respectively: O = 45.2 ± 2.4 vs. 42.4 ± 2.3 p<0.05; O@VT = 33.7 ± 2.0 vs. 32.3 ± 1.6; GXT-TTE = 521.7 ± 73.4 vs. 495.3 ± 72.8 (p<0.05); VTER = 846.2 ± 166.0 vs. 743.1 ± 124.7; O2pulse = 24.5 ± 1.4 vs. 23.1 ± 1.3 (p<0.05). Experiment 2 PMP vs. NMP, respectively: O = 43.3 ± 1.6 vs. 41.7 ± 1.6 (p<0.05); O@VT = 31.1 ± 1.2 vs. 29.1 ± 1.3 (p<0.05); GXT-TTE = 511.7 ± 49.6 vs. 486.4 ± 49.6 (p<0.05); VTER 872.4 ± 134.0 vs. 792.9 ± 122.4; Opulse = 24.1 ± 0.9 vs. 23.4 ± 0.9 (p<0.05). Results demonstrate that the PMP conferred a significant performance benefit to cyclists completing high intensity cycling exercise.
我们测试了一种呼气末正压（4.2厘米水柱）口含器（PMP）对健康成年人最大骑行表现的影响。实验1，PMP与非PMP口含器（CON）对比[样本量n = 9（5名男性），年龄 = 30 ± 2岁]；实验2，PMP与无口含器（NMP）对比[样本量n = 10（7名男性），年龄 = 27 ± 1岁]。在两个实验的时间点1（口含器条件随机分配），受试者进行分级骑行测试（GXT）（科里瓦尔®功率自行车测力计）以确定最大摄氧量（VO₂max）、脉搏（Opulse）、GXT耐力时间（GXT-T）以及通气阈值时的摄氧量（VO₂@VT）。在72小时后的时间点2，受试者完成一次通气阈值耐力骑行[VTER]，以在VO₂@VT功率下骑至力竭。一周后的时间点3和4（控制时间），受试者在交替的口含器条件下重复测试方案。选定结果（配对t检验，p<0.05）：实验1中PMP与CON对比，分别为：VO₂max = 45.2 ± 2.4 对比 42.4 ± 2.3，p<0.05；VO₂@VT = 33.7 ± 2.0 对比 32.3 ± 1.6；GXT-TTE = 521.7 ± 73.4 对比 495.3 ± 72.8（p<0.05）；VTER = 846.2 ± 166.0 对比 743.1 ± 124.7；O₂pulse = 24.5 ± 1.4 对比 23.1 ± 1.3（p<0.05）。实验2中PMP与NMP对比，分别为：VO₂max = 43.3 ± 1.6 对比 41.7 ± 1.6（p<0.05）；VO₂@VT = 31.1 ± 1.2 对比 29.1 ± 1.3（p<0.05）；GXT-TTE = 511.7 ± 49.6 对比 486.4 ± 49.6（p<0.05）；VTER 872.4 ± 134.0 对比 792.9 ± 122.4；O₂pulse = 24.1 ± 0.9 对比 23.4 ± 0.9（p<0.05）。结果表明，PMP为完成高强度骑行运动的骑行者带来了显著的表现优势。
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