Zhang Rubin, Zhan Likui, Sun Shaoming, Peng Wei, Sun Yining
Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei, Anhui, PR, China.
Department of Automation, University of Science and Technology of China, Hefei, Anhui, PR China.
J Sports Sci Med. 2017 Aug 8;16(3):357-364. eCollection 2017 Sep.
The maximum oxygen uptake (V̇O max), determined from graded maximal or submaximal exercise tests, is used to classify the cardiorespiratory fitness level of individuals. The purpose of this study was to examine the validity and reliability of the YMCA submaximal exercise test protocol performed on a newly-designed rectilinear stepping ergometer (RSE) that used up and down reciprocating vertical motion in place of conventional circular motion and giving precise measurement of workload, to determine V̇O max in young healthy male adults. Thirty-two young healthy male adults (32 males; age range: 20-35 years; height: 1.75 ± 0.05 m; weight: 67.5 ± 8.6 kg) firstly participated in a maximal-effort graded exercise test using a cycle ergometer (CE) to directly obtain measured V̇O max. Subjects then completed the progressive multistage test on the RSE beginning at 50W and including additional stages of 70, 90, 110, 130, and 150W, and the RSE YMCA submaximal test consisting of a workload increase every 3 minutes until the termination criterion was reached. A metabolic equation was derived from the RSE multistage exercise test to predict oxygen consumption (V̇O) from power output (W) during the submaximal exercise test (V̇O (mL·min )=12.4 ×W(watts)+3.5 mL·kg·min×M+160mL·min, R= 0.91, standard error of the estimate (SEE) = 134.8mL·min). A high correlation was observed between the RSE YMCA estimated V̇O max and the CE measured V̇O max (r=0.87). The mean difference between estimated and measured V̇O max was 2.5 mL·kg·min, with an SEE of 3.55 mL·kg·min. The data suggest that the RSE YMCA submaximal exercise test is valid for predicting V̇O max in young healthy male adults. The findings show that the rectilinear stepping exercise is an effective submaximal exercise for predicting V̇O max. The newly-designed RSE may be potentially further developed as an alternative ergometer for assessing cardiorespiratory fitness and the promotion of personalized health interventions for health care professionals.
通过分级最大或次最大运动测试确定的最大摄氧量（V̇O max），用于对个体的心肺适能水平进行分类。本研究的目的是检验在一种新设计的直线踏步测力计（RSE）上进行的YMCA次最大运动测试方案的有效性和可靠性，该测力计使用上下往复垂直运动代替传统的圆周运动，并能精确测量工作量，以确定年轻健康男性成年人的V̇O max。32名年轻健康男性成年人（32名男性；年龄范围：20 - 35岁；身高：1.75±0.05米；体重：67.5±8.6千克）首先参加了使用自行车测力计（CE）的最大努力分级运动测试，以直接获得测量的V̇O max。受试者随后在RSE上完成了从50W开始的渐进多阶段测试，包括70、90、110、130和150W的附加阶段，以及RSE YMCA次最大测试，该测试包括每3分钟增加一次工作量，直至达到终止标准。从RSE多阶段运动测试中推导出一个代谢方程，以预测次最大运动测试期间功率输出（W）的耗氧量（V̇O）（V̇O（毫升·分钟）=12.4×W（瓦特）+3.5毫升·千克·分钟×M + 160毫升·分钟，R = 0.91）。在RSE YMCA估计的V̇O max和CE测量的V̇O max之间观察到高度相关性（r = 0.87）。估计的和测量的V̇O max之间的平均差异为2.5毫升·千克·分钟，标准误为3.55毫升·千克·分钟。数据表明，RSE YMCA次最大运动测试对于预测年轻健康男性成年人的V̇O max是有效的。研究结果表明，直线踏步运动是预测V̇O max的一种有效的次最大运动。新设计的RSE可能有潜力进一步开发，作为评估心肺适能的替代测力计，并为医疗保健专业人员促进个性化健康干预措施。
