Tolusso Danilo V, Dobbs Ward C, Esco Michael R
Department of Kinesiology, University of Alabama, Tuscaloosa, AL, USA.
Department of Exercise and Sport Science, University of Wisconsin-La Crosse, La-Crosse, WI, USA.
Int J Exerc Sci. 2018 Oct 1;11(4):1173-1183. doi: 10.70252/GVCV6208. eCollection 2018.
Rating of perceived exertion (RPE) extrapolation involves mathematically extending the submaximal relationship between RPE and oxygen consumption (VO) to maximal intensity. This technique allows practitioners to forego, potentially dangerous, maximal exertion testing while attaining accurate measures of maximal oxygen consumption used for exercise prescription. This method has been proven accurate in adults, but much less in known when applied to an adolescent population. The purpose of this study was to assess the accuracy of the RPE extrapolation as method for estimating VO in adolescents. Twenty-two healthy, asymptomatic adolescents performed a graded exercise test (GXT) to exhaustion. Heart rate and VO were recorded throughout the bout with RPE being queried every two minutes using the Borg (6-20) RPE scale. Individual regression lines were fitted for each subject using RPE and VO for RPE values up to 13,15, and 17. Theoretical maximal RPE values of 20 and 19 were entered into the equation to calculate an estimated VO. Repeated measures ANOVA with planned contrasts showed that all VO estimation methods significantly overpredicted measured VO ( < .001). Error analysis via Bland-Altman plots revealed large limits of agreement between the all methods, indicating large variability in error between estimated and measured VO. The results suggest that submaximal RPE values using the Borg scale cannot be used to predict VO in children due to the amount of error in the prediction equations. These inaccuracies could lead to potential under or over-prescription of exercise intensity and adverse effects on the person's health.
自感用力度（RPE）外推法是指通过数学方法将RPE与耗氧量（VO）之间的次最大关系扩展至最大强度。这项技术使从业者能够在不进行可能危险的最大用力测试的情况下，获得用于运动处方的最大耗氧量的准确测量值。该方法在成年人中已被证明是准确的，但应用于青少年人群时了解得较少。本研究的目的是评估RPE外推法作为估计青少年VO的方法的准确性。22名健康、无症状的青少年进行了分级运动试验（GXT）直至 exhaustion。在整个试验过程中记录心率和VO，每两分钟使用Borg（6 - 20）RPE量表询问一次RPE。使用RPE值高达13、15和17时的RPE和VO为每个受试者拟合个体回归线。将理论最大RPE值20和19代入方程以计算估计的VO。采用计划对比的重复测量方差分析表明，所有VO估计方法均显著高估了测量的VO（<.001）。通过Bland - Altman图进行的误差分析显示所有方法之间的一致性界限很大，表明估计的VO和测量的VO之间的误差存在很大变异性。结果表明，由于预测方程中的误差量，使用Borg量表的次最大RPE值不能用于预测儿童的VO。这些不准确可能导致运动强度的潜在不足或过度处方，并对个人健康产生不利影响。
