Correlational v ratio adjustments of body weight in exercise-oxygen studies.

Abstract The relationship between Vo2 max in 1/min, ml/kg/min and two endurance performance measures were investigated. The data indicated that endurance performance and Vo2 max were to a large extent task specific. Use of the ratio ml/kg/min was shown to result in spurious correlations between that measure and work performance. Use of partial correlations to statistically remove the spurious influence of heterogeneity in body weight was demonstrated. The correlation of r = 0·87 for Vo2 , max in 1/min and total work measured simultaneously on a continuous step-increment bicycle test was shown to be spuriously inflated due to the common element of ergometer riding time. When this spurious factor was partialed out, the r=0·87 was reduced to r = 0·30.

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