Abstract

This study examined the effectiveness of a 3200-m time trial run for predicting VO2 and running velocity at lactate threshold (LT), and fixed blood lactate concentrations (FBLC) of 2.0, 2.5, and 4.0 mM and peak in untrained women. 39 female subjects completed a VO2peak/LT test and a 3200-m time trial run. 28 subjects were randomly assigned to a validation sample and the remaining subjects were used for cross-validation purposes. In the validation sample, VO2 measurements at LT, FBLC of 2.0, 2.5, 4.0 mM, and peak were 22.5, 29.2, 31.2, 36.5, and 38.5 ml/kg/min, respectively. Velocities at LT, FBLC of 2.0, 2.5, 4.0 mM, and peak were 107.1, 129.7, 136.6, 155.1, and 163.2 m/min, respectively. Regression analysis in the validation group revealed that the 3200-m time trial was an accurate predictor of velocities at LT, FBLC of 2.0, 2.5, 4.0 mM, and peak with correlations of r=0.70, r=0.84, r=0.85, r=0.87, and r=0.95, respectively. For VO2 prediction, correlations ranged from r=0.61 (3200-m time vs VO2 LT) to r=0.77 (3200-m time vs VO2 peak) with the standard errors of estimate ranging from +/-4.18 (VO2 2.0 mM) to +/-4.87 ml/kg/min (VO2 4.0 mM). Results for the cross-validation subjects revealed that, for both velocity and VO2, correlations between actual and predicted values were high, and that SE scores were similar to the SEE observed for the validation group. It was concluded that in untrained women performance on a 3200-m time trial accurately predicts VO2 and velocity at LT, FBLC of 2.0, 2.5, 4.0 mM, and peak. Verf.-Referat (gekuerzt)