不同运动方式对健康受试者呼吸困难和腿部疲劳的影响。
The effect of different exercise modalities on dyspnea and leg fatigue in healthy subjects.
作者信息
Sharma Pramod, Morris Norman R, Adams Lewis
机构信息
Menzies Health Institute of Queensland/ School of Allied Health Sciences, Griffith University, Gold Coast Campus, Australia.
Menzies Health Institute of Queensland/ School of Allied Health Sciences, Griffith University, Gold Coast Campus, Australia.
出版信息
Respir Physiol Neurobiol. 2015 May;210:44-50. doi: 10.1016/j.resp.2015.02.001. Epub 2015 Feb 16.
BACKGROUND
This study documents the impact of different exercise modalities on dyspnea and leg fatigue during equivalent cardiopulmonary stress in healthy subjects.
METHODOLOGY
Following a familiarization, 20 subjects (age 21-44 years; 8 males) performed six 5-min exercise tests, randomized among: 2 steep slope treadmill tests (25% grade), 2 lesser slope treadmill tests (12% grade) and 2 bicycle tests on 3 separate days. Subjects reported either dyspnea or leg fatigue during each test. Oxygen consumption (VO2), ventilation (VE), respiratory rate (fR) and heart rate (HR) were measured during each test.
RESULTS
VO2,VE, HR, dyspnea and leg fatigue were not significantly different among the three exercise conditions (p > 0.05).
CONCLUSION
These findings indicate that at equivalent levels of cardiopulmonary stress reflected by similar levels of VO2 and heart rate, the perceived level of exertional dyspnea is not influenced by different patterns of neuromuscular activity. Similarly, the intensity of leg fatigue primarily reflects whole body work and is independent of different patterns of neuromuscular activity.
背景
本研究记录了在健康受试者同等心肺应激状态下，不同运动方式对呼吸困难和腿部疲劳的影响。
方法
在进行适应性训练后，20名受试者（年龄21 - 44岁；8名男性）在3个不同日期进行了6次5分钟的运动测试，测试随机分为：2次陡坡跑步机测试（坡度25%）、2次缓坡跑步机测试（坡度12%）和2次自行车测试。受试者在每次测试中报告呼吸困难或腿部疲劳情况。在每次测试过程中测量耗氧量（VO2）、通气量（VE）、呼吸频率（fR）和心率（HR）。
结果
在三种运动条件下，VO2、VE、HR、呼吸困难和腿部疲劳情况均无显著差异（p > 0.05）。
结论
这些研究结果表明，在由相似水平的VO2和心率反映出的同等心肺应激水平下，主观感觉到的运动性呼吸困难程度不受不同神经肌肉活动模式的影响。同样，腿部疲劳的强度主要反映全身的工作量，并且与不同的神经肌肉活动模式无关。
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