Butler P J, Woakes A J, Anderson L S, Roberts C A, Marlin D J
School of Biological Sciences, University of Birmingham, Edgbaston, UK.
Respir Physiol. 1993 Jul;93(1):51-6. doi: 10.1016/0034-5687(93)90067-k.
The purpose of this study was to test the hypothesis that locomotor-respiratory coupling in horses may provide a basis for the appropriate matching of lung ventilation to running speed and metabolic power. This was achieved by determining the effect on respiratory frequency and tidal volume in thoroughbred horses of changing running speed while maintaining a constant metabolic demand by also varying the incline of the treadmill. This procedure was performed at three different speeds at two different levels of metabolic rate. It appears that, in response to metabolic demands which are not directly related to speed, horses can control tidal volume independently of stride length but they do not vary respiratory frequency independently of stride frequency. When running at 0 degrees incline, however, they probably do not operate an elevated tidal volume, because of the increased energetic costs such an elevated tidal volume would incur.
本研究的目的是验证一个假设，即马的运动-呼吸耦合可能为肺通气与奔跑速度和代谢功率的适当匹配提供基础。这是通过在跑步机上改变坡度以维持恒定代谢需求的同时改变纯种马的奔跑速度，来确定其对呼吸频率和潮气量的影响而实现的。该过程在三种不同速度和两种不同代谢率水平下进行。似乎，对于与速度无直接关系的代谢需求，马可以独立于步幅长度来控制潮气量，但它们不会独立于步频来改变呼吸频率。然而，当在0度坡度下奔跑时，由于潮气量增加会带来更高的能量消耗，它们可能不会维持较高的潮气量。
