Department of Kinesiology, Kansas State University, Manhattan, KS, USA; Department of Anatomy and Physiology, Kansas State University, Manhattan, KS, USA.
Department of Health and Exercise Science, University of Oklahoma, Norman, OK, USA.
Respir Physiol Neurobiol. 2015 Mar;208:1-7. doi: 10.1016/j.resp.2014.12.008. Epub 2014 Dec 15.
It is not known if the respiratory compensation point (RCP) is a distinct work rate (Watts (W)) or metabolic rate V̇(O2) and if the RCP is mechanistically related to critical power (CP). To examine these relationships, 10 collegiate men athletes performed cycling incremental and constant-power tests at 60 and 100 rpm to determine RCP and CP. RCP work rate was significantly (p≤0.05) lower for 100 than 60 rpm (197±24 W vs. 222±24 W), while RCP V̇(O2) was not significantly different (3.00±0.33 l min(-1) vs. 3.12±0.41 l min(-1)). CP at 60 rpm (214±51 W; V̇(O2): 3.01±0.69 l min(-1)) and 100 rpm (196±46 W; V̇(O2): 2.95±0.54 l min(-1)) were not significantly different from RCP. However, RCP and CP were not significantly correlated. These findings demonstrate that RCP represents a distinct metabolic rate, which can be achieved at different power outputs, but that RCP and CP are not equivalent parameters and should not, therefore, be used synonymously.
目前尚不清楚呼吸补偿点（RCP）是一个独特的工作率（瓦特（W））还是代谢率 V̇（O2），以及 RCP 是否与临界功率（CP）在机制上相关。为了研究这些关系，10 名大学生运动员以 60 和 100 rpm 的转速进行递增和恒功率自行车测试，以确定 RCP 和 CP。100 rpm 时的 RCP 工作率显著低于 60 rpm（197±24 W 比 222±24 W），而 RCP V̇（O2）无显著差异（3.00±0.33 l min(-1) 比 3.12±0.41 l min(-1)）。60 rpm（214±51 W；V̇（O2）：3.01±0.69 l min(-1)）和 100 rpm（196±46 W；V̇（O2）：2.95±0.54 l min(-1)）的 CP 与 RCP 无显著差异。然而，RCP 和 CP 之间没有显著相关性。这些发现表明，RCP 代表了一个独特的代谢率，可以在不同的功率输出下实现，但 RCP 和 CP 不是等效的参数，因此不应同义使用。
