title: Estimation of peak oxygen consumption from a sub-maximal half mile walk in obese females.
abstract: This study compared peak oxygen consumption estimated from a half mile sub-maximal walk test with oxygen consumption determined from a maximal treadmill test with 96 obese females. A half mile walk was completed as quickly as possible without running. Retests on 71 subjects were completed to determine the reliability of the half mile walk. Hearts rates were obtained for 15 s immediately upon completion of the walks. Stepwise regression to estimate peak VO2 was used with the following variables: walk time (TM), body weight, height, BMI, age, and heart rate (HR). The best equation was peak VO2 (ml/kg/min) = 53.23 - (1.98 x TM) - (0.32 x BMI) - (0.08 x age), r = 0.76, s.e.e. = 2.89 ml/kg/min. The mean difference between determined and estimated peak VO2 in a cross-validation group of subjects who were not included in the validation group was 0.15 ml/kg/min (n.s.), r = 0.77, s.e.e. = 3.01 ml/kg/min, E = 3.09. Reliability for time to complete the half mile walk was r = 0.87 with 0.1 min difference (n.s.). This study indicated the half mile walk to provide an accurate, reliable estimate of peak VO2 which should be useful in the clinical setting.
authors.affiliation: Human Performance Laboratory, University of Nebraska-Kearney 68849.
authors.forename: J E
authors.initials: JE
authors.lastname: Donnelly
authors.forename: D J
authors.initials: DJ
authors.lastname: Jacobsen
authors.forename: J M
authors.initials: JM
authors.lastname: Jakicic
authors.forename: J
authors.initials: J
authors.lastname: Whatley
authors.forename: S
authors.initials: S
authors.lastname: Gunderson
authors.forename: W J
authors.initials: WJ
authors.lastname: Gillespie
authors.forename: G L
authors.initials: GL
authors.lastname: Blackburn
authors.forename: Z V
authors.initials: ZV
authors.lastname: Tran
mesh_terms: D000328:Adult; D005080:Exercise Test / Q000379:methods*; D005260:Female; D006801:Humans; D008875:Middle Aged; D009765:Obesity / Q000378:metabolism*; D010101:Oxygen Consumption / Q000502:physiology*; D011237:Predictive Value of Tests; D012044:Regression Analysis; D016138:Walking