健康正常体重年轻男性的摄氧量效率斜率：一种适用的计算和解释框架。
Oxygen uptake efficiency slope in healthy normal weight young males: an applicable framework for calculation and interpretation.
机构信息
Department of Movement, Human and Health Sciences, University of Rome "Foro Italico", Roma, Lazio, Italy.
Department of Unicusano, Niccolò Cusano University, Roma, Lazio, Italy.
出版信息
PeerJ. 2022 Jul 13;10:e13709. doi: 10.7717/peerj.13709. eCollection 2022.
BACKGROUND
The oxygen uptake efficiency slope (OUES) is considered a reliable indicator of cardiorespiratory fitness in young and clinical populations who cannot achieve maximal effort during a graded exercise test. However, OUES accuracy depends on the data points used for its calculation and it is still not clear if the submaximal OUES can accurately assess CRF in healthy young males.
OBJECTIVE
We investigated the association between peak oxygen uptake and peak and submaximal OUES, and the agreement between submaximal OUES and peak OUES in male adolescents and young adults.
METHODS
In this cross-sectional, observational study, fifty normal weight healthy participants (age 14-22 years, peak oxygen uptake 43.8 ± 7.3 mL·min·kg) performed a graded exercise test on a cycle ergometer and pulmonary gas exchange was assessed using breath-by-breath analysis. Peak oxygen uptake, and oxygen consumption at the aerobic and at the anaerobic threshold were determined as the 30-s average of the oxygen consumption values. Peak OUES (up to peak) and submaximal OUES (up to the aerobic and anaerobic thresholds) were calculated from the logarithmic relation between oxygen consumption and pulmonary ventilation.
RESULTS
Very strong correlations were observed between peak oxygen uptake and peak OUES ( = 0.80-0.88) while fair-to-very strong correlations were observed between the peak oxygen uptake and the two submaximal OUES ( = 0.32-0.81). The level of agreement between peak OUES and OUES up to the anaerobic threshold ( = 0.89-0.93; Typical percentage error 6%; Intraclass correlation coefficient = 0.89-0.93) was greater than the one between the peak oxygen uptake with OUES up to the aerobic threshold ( = 0.39-0.56; Typical percentage error 15%; Intraclass correlation coefficient = 0.38-0.56).
CONCLUSIONS
. The peak OUES is a better indicator of aerobic fitness than the OUES up to the anaerobic threshold in healthy, young males. The OUES up to the anaerobic threshold is a valid alternative to peak OUES.
背景
氧气摄取效率斜率（OUES）被认为是无法在递增运动测试中达到最大努力的年轻人群和临床人群心肺功能适应性的可靠指标。然而，OUES 的准确性取决于用于计算它的数据点，并且在健康的年轻男性中，亚最大 OUES 是否可以准确评估 CRF 仍不清楚。
目的
我们研究了男性青少年和年轻成年人中最大摄氧量与最大和亚最大 OUES 之间的关系，以及亚最大 OUES 与最大 OUES 之间的一致性。
方法
在这项横断面观察研究中，五十名正常体重的健康参与者（年龄 14-22 岁，最大摄氧量 43.8 ± 7.3 mL·min·kg）在自行车测力计上进行递增运动测试，使用逐口气分析评估肺气体交换。最大摄氧量和有氧和无氧阈时的耗氧量是通过耗氧量值的 30 秒平均值确定的。最大摄氧量和亚最大摄氧量（直到有氧和无氧阈）是从耗氧量和肺通气的对数关系中计算出来的。
结果
最大摄氧量与最大 OUES 之间存在很强的相关性（r = 0.80-0.88），而最大摄氧量与两个亚最大 OUES 之间存在很好到很强的相关性（r = 0.32-0.81）。最大 OUES 与无氧阈时的 OUES 之间的一致性水平（r = 0.89-0.93；典型百分比误差 6%；组内相关系数 = 0.89-0.93）大于最大摄氧量与有氧阈时的 OUES 之间的一致性水平（r = 0.39-0.56；典型百分比误差 15%；组内相关系数 = 0.38-0.56）。
结论
在健康的年轻男性中，最大 OUES 是有氧适应性的更好指标，而不是无氧阈时的 OUES。无氧阈时的 OUES 是最大 OUES 的有效替代指标。
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