Predicting VO2max and Ventilatory Threshold utilizing the Rockport Fitness Walking Test and terminal RPE
Wozniak, Kayetan J.
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The purpose of this study was to determine the accuracy of estimating VO2max and Ventilatory Threshold from the RFWT time and RPE at the conclusion of the test. Subjects (N=125) were 18-67yrs of age and ranged from sedentary to very active with VO2max ranging 25.2-60.1ml/kg/min. Each subject performed an incremental maximal treadmill test using a modified Balke protocol. VO2max and VT were measured using open spirometry. After 24-48hrs rest, subjects performed the RFWT and gave terminal RPE using the Borg 6-20 scale. Measured vs. predicted VO2max presented fair to moderate correlations. Measured vs. predicted VO2 @ VT presented low correlations. Compared to the original RFWT (Kline et al. 1987), a modified prediction equation using Borg 6-20 terminal RPE in place of terminal HR performed better (R2 = 0.464). Simplified versions were found to improve in validity with more predictors.
Exercise -- Physiological aspects