Bunc V, Hofmann P, Leitner H, Gaisl G
Faculty of Physical Education and Sport, Charles University, Prague, Czech Republic.
Eur J Appl Physiol Occup Physiol. 1995;70(3):263-9. doi: 10.1007/BF00238574.
Among the methods for determining anaerobic threshold (AT), the heart rate (HR) method seems to be the simplest. On the other hand, many conflicting results from comparing this method with others have been presented over the last 10 years. Therefore, the aim of this study was to compare the heart rate threshold (HRT) with the lactate turn point (LTP)-"second" break point of dependence of lactate (LA) to power output, ventilatory threshold (VT) and threshold determined by electromyography (EMGAT), all determined by the same exercise test and evaluated by the same computer algorithm. A group of 24 female students [mean age 20.5 (SD 1.6) years, maximal oxygen consumption 48.8 (SD 4.7) ml.kg-1.min-1] performed an incremental exercise test on a cycle ergometer (modified Conconi test) starting with an initial power output (PO) of 40 W with intensity increments of 10 W.min-1 until the subjects were exhausted. The HRT, LTP and EMGAT determination was done by computer-aided break-point regression analysis from dependence of functional measures on PO. The same computer algorithm was used for VT determination from the relationship between ventilation (V) and oxygen uptake (VO2) or carbon dioxide output (VCO2).(ABSTRACT TRUNCATED AT 250 WORDS)
在确定无氧阈（AT）的方法中，心率（HR）法似乎是最简单的。另一方面，在过去10年里，将该方法与其他方法进行比较得出了许多相互矛盾的结果。因此，本研究的目的是将心率阈（HRT）与乳酸拐点（LTP）——乳酸（LA）对功率输出依赖性的“第二个”断点、通气阈（VT）以及通过肌电图测定的阈值（EMGAT）进行比较，所有这些均通过相同的运动测试确定，并由相同的计算机算法进行评估。一组24名女学生[平均年龄20.5（标准差1.6）岁，最大耗氧量48.8（标准差4.7）ml·kg⁻¹·min⁻¹]在自行车测力计上进行递增运动测试（改良的康科尼测试），初始功率输出（PO）为40 W，强度以10 W·min⁻¹递增，直至受试者力竭。HRT、LTP和EMGAT的测定通过计算机辅助断点回归分析，根据功能指标对PO的依赖性来完成。VT的测定使用相同的计算机算法，根据通气量（V）与摄氧量（VO₂）或二氧化碳排出量（VCO₂）之间的关系来进行。（摘要截短于250字）
