title: An accurate VO2max nonexercise regression model for 18-65-year-old adults.
abstract: The purpose of this study was to develop a regression equation to predict maximal oxygen uptake (VO2max) based on nonexercise (N-EX) data. All participants (N = 100), ages 18-65 years, successfully completed a maximal graded exercise test (GXT) to assess VO2max (M = 39.96 mL x kg(-1) x min(-1), SD = 9.54). The N-EX data collected just before the maximal GXT included the participant's age; gender; body mass index (BMI); perceived functional ability (PFA) to walk, jog, or run given distances; and current physical activity (PA-R) level. Multiple linear regression generated the following N-EX prediction equation (R = .93, SEE = 3.45 mL x kg(-1) x min(-1), % SEE = 8.62): VO2max (mL x kg(-1) x min(-1)) = 48.0730 + (6.1779 x gender; women = 0, men = 1) - (0. 2463 x age) - (0.6186 x BMI) + (0.7115 x PFA) + (0.6709 x PA-R). Cross validation using PRESS (predicted residual sum of squares) statistics revealed minimal shrinkage (R(p) = .91 and SEE(p) = 3.63 mL x kg(-1) x min(-1)); thus, this model should yield acceptable accuracy when applied to an independent sample of adults (ages 18-65 years) with a similar cardiorespiratory fitness level. Based on standardized beta-weights, the PFA variable (0.41) was the most effective at predicting VO2max followed by age (-0.34), gender (0.33), BMI (-0.27), and PA-R (0.16). This study provides a N-EX regression model that yields relatively accurate results and is a convenient way to predict VO2max in adult men and women.
authors.affiliation: Department of Exercise Sciences, Brigham Young University, Provo, Utah 84602, USA.
authors.forename: Danielle I
authors.initials: DI
authors.lastname: Bradshaw
authors.forename: James D
authors.initials: JD
authors.lastname: George
authors.forename: Annette
authors.initials: A
authors.lastname: Hyde
authors.forename: Michael J
authors.initials: MJ
authors.lastname: LaMonte
authors.forename: Pat R
authors.initials: PR
authors.lastname: Vehrs
authors.forename: Ronald L
authors.initials: RL
authors.lastname: Hager
authors.forename: Frank G
authors.initials: FG
authors.lastname: Yanowitz
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D005080:Exercise Test; D005260:Female; D006801:Humans; D016014:Linear Models; D008297:Male; D008875:Middle Aged; D008954:Models, Biological; D015233:Models, Statistical; D010101:Oxygen Consumption / Q000502:physiology*; D011237:Predictive Value of Tests; D015203:Reproducibility of Results