title: Prediction of VO2max in Children and Adolescents Using Exercise Testing and Physical Activity Questionnaire Data.
abstract: OBJECTIVE
  The purpose of this study was to evaluate the use of a treadmill walk-jog-run exercise test previously validated in adults and physical activity questionnaire data to estimate maximum oxygen consumption (VO2max) in boys (n = 62) and girls (n = 66) aged 12 to 17 years old.
  
  
  METHODS
  Data were collected from Physical Activity Rating (PA-R) and Perceived Functional Ability (PFA) questionnaires, a walk-jog-run submaximal treadmill exercise test, and a maximal graded exercise test.
  
  
  RESULTS
  Regression analysis resulted in the development of 2 models to predict VO2max. Submaximal exercise test data were used to build the following model (R2 = .73; SEE = 4.59 mL + kg(- 1) + min(- 1)): VO2max (mL + kg(- 1) + min(- 1)) = 26.890+(5.877 × Gender; 0 = female; 1 = male) - (0.782 × Body Mass Index [BMI])+(0.438 × PFA Score) +(2.712 × Treadmill Speed; mph) +(0.746 × Age) +(0.449 × PA-R Score). Maximal exercise test data were used to build the following model (R2 = .83; SEE = 3.63 mL + kg(- 1) + min(- 1)): VO2max (mL + kg(- 1) + min(- 1)) = 10.716+(1.334 × Maximal Treadmill Grade) +(5.203 × Treadmill Speed; mph) +(3.494 × Gender; 0 = female; 1 = male) - (0.413 × BMI) +(0.249 × PFA).
  
  
  CONCLUSIONS
  The results of this study demonstrate, for the first time, that regression equations that use both exercise data and physical activity questionnaire data can accurately predict VO2max in youth. The submaximal and maximal exercise tests that use self-selected treadmill speeds can be used to assess cardiorespiratory fitness of youth with a wide range of fitness levels.
authors.affiliation: a University of Hawaii.
authors.forename: Nate E
authors.initials: NE
authors.lastname: Black
authors.affiliation: b Brigham Young University.
authors.forename: Pat R
authors.initials: PR
authors.lastname: Vehrs
authors.affiliation: b Brigham Young University.
authors.forename: Gilbert W
authors.initials: GW
authors.lastname: Fellingham
authors.affiliation: b Brigham Young University.
authors.forename: James D
authors.initials: JD
authors.lastname: George
authors.affiliation: b Brigham Young University.
authors.forename: Ron
authors.initials: R
authors.lastname: Hager
mesh_terms: D000293:Adolescent; D000072599:Cardiorespiratory Fitness / Q000502:physiology; D002648:Child; D015444:Exercise; D005080:Exercise Test; D005260:Female; D006801:Humans; D008297:Male; D008954:Models, Biological; D009043:Motor Activity / Q000502:physiology*; D010101:Oxygen Consumption / Q000502:physiology*; D011795:Surveys and Questionnaires
keywords: Cardiorespiratory fitness; fitness testing; maximum oxygen uptake