Locomotor-respiratory coupling during wheelchair propulsion.
Locomotor-respiratory coupling during wheelchair propulsion.
复制标题
轮椅推进过程中的运动-呼吸耦合。
DOI：
10.1152/jappl.1992.72.4.1375
复制
发表时间：
1992
影响因子：
3.3
通讯作者：
D. MacLeod
中科院分区：
文献类型：
--
作者：
M. L. MacDonald;R. Kirby;S. T. Nugent;D. MacLeod
由于冲击负荷引起的内脏运动被认为在许多哺乳动物物种中检测到的运动-呼吸耦合（LRC）中起作用。在描述了LRC的鸟类和蝙蝠物种中，翅膀肌肉对呼吸时间的影响似乎是主要的影响。为了验证LRC发生在人类推动轮椅（没有冲击载荷，手臂用于运动）的假设，我们在电动跑步机上以三种速度研究了10名轮椅运动员。每个受试者的数据都通过光谱分析（基于快速傅立叶变换）进行分析，在30个测试设置中的12个（40%）中检测到明显的LRC（个位数整数比率在1%以内的比率）。然而，对照分析，其中每个受试者的手臂推入率与另一个受试者的呼吸率进行比较，显示明显（但错误）耦合在8(27%)，并没有显著减少（使用chi 2检验）。这些发现似乎反驳了LRC发生在轮椅推进过程中的假设。这些数据与内脏活塞对LRC很重要的理论是一致的，并且表明在这种情况下，有节奏的手臂运动不足以诱发这种现象。
Visceral movement due to impact loading is believed to play a role in the locomotor-respiratory coupling (LRC) that has been detected in a number of mammalian species. In the bird and bat species in which LRC has been described, the effect of the wing muscles on the timing of respiration appears to be a dominant influence. To test the hypothesis that LRC occurs in humans propelling wheelchairs (where there is no impact loading and the arms are used for locomotion), we studied 10 wheelchair athletes on a motorized treadmill at three speeds. Each subject's data were analyzed by spectral analysis (based on the fast Fourier transform), which detected apparent LRC (rates within 1% of a single-digit integer ratio) in 12 (40%) of the 30 test settings. However, a control analysis, in which each subject's arm-thrust rates were compared with another subject's breathing rates, revealed apparent (but false) coupling in 8 (27%), not significantly less often (using the chi 2 test). These findings appear to refute the hypothesis that LRC occurs during wheelchair propulsion. These data are consistent with the theory that the visceral piston is important to LRC and suggest that rhythmic arm movements are insufficient to induce the phenomenon in this setting.