Breuer H W, Pfeiffer U, Worth H, Heusch G
Abteilung für Pathophysiologie, Zentrum für Innere Medizin, Universitätsklinikum Essen.
Z Kardiol. 1994;83 Suppl 3:51-5.
The importance of the reference system (arbitrary abscissa units) for the analysis of the time courses of cardiopulmonary exercise test indices was assessed. Ten untrained students, 10 athletes, and 10 triathletes performed an exhaustion-limited cycling test. The courses of 20 pulmonary and hemodynamic indices were investigated with respect to the reference systems "heart rate," "relative and absolute oxygen consumption," "power," and a newly developed index "power-duration-product." Most of the significant differences were observed by reference to the power-duration-product. When using the power-duration-product as reference, the courses of eight indices differed significantly between students and triathletes, the courses of five indices between students and athletes, and the course of one index between athletes and triathletes. Since the number of the significant differences between the groups, as well as the courses themselves, depended clearly on the underlying reference system, the choice of the reference system must be considered as an important determinant for the analysis of cardiopulmonary exercise tests.
评估了参考系统（任意横坐标单位）在分析心肺运动试验指标时间进程中的重要性。10名未经训练的学生、10名运动员和10名铁人三项运动员进行了极限运动自行车测试。针对“心率”“相对和绝对耗氧量”“功率”以及新开发的指标“功率-持续时间乘积”等参考系统，研究了20项肺和血流动力学指标的变化过程。通过参考功率-持续时间乘积观察到了大多数显著差异。当以功率-持续时间乘积作为参考时，学生和铁人三项运动员之间有8项指标的变化过程存在显著差异，学生和运动员之间有5项指标的变化过程存在显著差异，运动员和铁人三项运动员之间有1项指标的变化过程存在显著差异。由于组间显著差异的数量以及变化过程本身明显取决于基础参考系统，因此参考系统的选择必须被视为心肺运动试验分析的一个重要决定因素。
