Comparison of Specific Prediction Equations to Estimate Peak Oxygen Uptake in Obese Women

Abstract

The aim of the current study was to compare 2 equations to predict peak oxygen uptake (V̇O₂peak) in obese women, according to their obesity class. 92 maximal cardiopulmonary exercise testing sets (CPET with initial and subsequent increments set to achieve an exercise duration between 8–12 min) were retrospectively analysed. These CPET were divided into 3 groups according to the women body mass indexes (BMI): class 1 (30 kg.m⁻²≤BMI<35 kg.m⁻², n=22), class 2 (35 kg.m⁻²≤BMI<40 kg.m⁻², n=36) or class 3 (BMI≥40 kg.m⁻², n=34). Each participant’s V̇O₂peak was predicted from 2 prediction equations (from Wasserman et al.'s and Debeaumont et al.'s equations) and compared with the actual V̇O₂peak. Moreover, the correlations between these values were studied, and the accuracy of the predictions was analysed. Only predicted V̇O₂peak from the Debeaumont et al.'s equation was not significantly different from the actual V̇O₂peak in the women in obesity class 3 (p=0.89). Moreover, significant correlation was found between these values (p<0.001, r=0.68). The bias and the 95% limits of agreement represented -3.2±34.0%. In women in obesity class 3, Debeaumont et al.'s equation may be the accurate one to predict V̇O₂peak. However, the accuracy of predictions is low. Consequently, to improve this accuracy, new prediction equations for obese women are required according to the obesity class.

Key words

Maximal oxygen consumption - cardiopulmonary exercise testing - obesity - validity - accuracy

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