Lambrick Danielle M, Faulkner James A, Rowlands Ann V, Eston Roger G
School of Sport and Health Sciences, St Luke's Campus, University of Exeter, Heavitree Road, Exeter EX1 2LU, UK.
Eur J Appl Physiol. 2009 Sep;107(1):1-9. doi: 10.1007/s00421-009-1093-7. Epub 2009 Jun 2.
This study assessed the utility of a single, continuous exercise protocol in facilitating accurate estimates of maximal oxygen uptake V(O)(2max) from submaximal heart rate (HR) and the ratings of perceived exertion (RPE) in healthy, low-fit women, during cycle ergometry. Eleven women estimated their RPE during a continuous test (1 W 4 s(-1)) to volitional exhaustion (measured V(O)(2max)). Individual gaseous exchange thresholds (GETs) were determined retrospectively. The RPE and HR values prior to and including an RPE 13 and GET were extrapolated against corresponding oxygen uptake to a theoretical maximal RPE (20) and peak RPE (19), and age-predicted HRmax, respectively, to predict V(O)(2max)). There were no significant differences (P > 0.05) between measured (30.9 +/- 6.5 ml kg(-1) min(-1)) and predicted V(O)(2max) from all six methods. Limits of agreement were narrowest and intraclass correlations were highest for predictions of V(O)(2max) from an RPE 13 to peak RPE (19). Prediction of V(O)(2max) from a regression equation using submaximal HR and work rate at an RPE 13 was also not significantly different to actual V(O)(2max) (R( 2 ) = 0.78, SEE = 3.42 ml kg(-1) min(-1), P > 0.05). Accurate predictions of V(O)(2max) may be obtained from a single, continuous, estimation exercise test to a moderate intensity (RPE 13) in low-fit women, particularly when extrapolated to peak terminal RPE (RPE(19)). The RPE is a valuable tool that can be easily employed as an adjunct to HR, and provides supplementary clinical information that is superior to using HR alone.
本研究评估了一种单一的持续运动方案在通过次最大心率（HR）和自觉用力程度（RPE）准确估算健康、低体能女性在蹬车测力试验期间最大摄氧量V（O）₂max方面的效用。11名女性在持续测试（1W 4s⁻¹）至自愿力竭（测量V（O）₂max）期间估算其RPE。回顾性确定个体气体交换阈值（GETs）。将RPE 13及GET之前和包括该值在内的RPE和HR值分别与相应的摄氧量外推至理论最大RPE（20）和峰值RPE（19）以及年龄预测的HRmax，以预测V（O）₂max。六种方法测得的V（O）₂max（30.9±6.5ml kg⁻¹ min⁻¹）与预测的V（O）₂max之间无显著差异（P>0.05）。对于从RPE 13至峰值RPE（19）预测V（O）₂max，一致性界限最窄，组内相关性最高。使用RPE 13时的次最大HR和工作率通过回归方程预测的V（O）₂max与实际V（O）₂max也无显著差异（R² = 0.78，SEE = 3.42ml kg⁻¹ min⁻¹，P>0.05）。对于低体能女性，通过单一的持续估算运动测试至中等强度（RPE 13），尤其是外推至峰值终末RPE（RPE（19））时，可获得V（O）₂max的准确预测。RPE是一种有价值的工具，可轻松用作HR的辅助手段，并提供优于单独使用HR的补充临床信息。
