title: [Mathematical model for epidemiologic survey of the cardiorespiratory fitness without effort test].
abstract: OBJECTIVE
  Develop models to estimate the cardiopulmonary fitness without the effort test accomplishment, focusing an epidemiologic survey in young Brazilians. For that purpose, 243 volunteers were evaluated: 137 men (25 ,4 +/-6,39 years old) and 106 women (23,68+/-5,23 years old).
  
  
  METHODS
  The volunteers were randomized into two groups (Group 1 : control - with 81 men and 58 women; and Group 2 : cross-validation - with 56 men and 48 women), submitted to cardiopulmonary effort tests with direct gas analysis. The models were developed through multiple regression , applying the stepwise method, followed by the ANOVA One-Way analysis as Tukey's Post Hoc test to compare the averages.
  
  
  RESULTS
  The average of the maximum oxygen consumption in Group 1 was 48 ,45 +/-11,91 ml/kg.min -1 and in Group 2 was 46,54+/-9,89 ml/kg.min -1 . The multiple regression lines had described two models to estimate the maximum oxygen consumption with the following average values: model 1 =48 ,46 +/-11,41 and model 2=46,83+/-11.11 ml/kg.min -1 . No important difference was observed for the effort value. The average results of the maximum oxygen consumption estimated for Group 2 model 1=48 ,14 +/-10,74 ml/kg.min -1 and model 2 =46,59+/-10,36 ml/kg.min -1 were not significantly different from the values observed in the effort test.
  
  
  CONCLUSIONS
  the models for estimating the maximum oxygen consumption demonstrated good applicability in the epidemiologic survey for young Brazilians.
authors.affiliation: Laboratório de Biociências da Motricidade Humana, Universidade Federal do Rio Grande do Norte, Brasil. fpolicarpo@uol.com.br
authors.forename: Fernando
authors.initials: F
authors.lastname: Policarpo-Barbosa
authors.forename: Jose
authors.initials: J
authors.lastname: Fernandes-Filho
authors.forename: Paula
authors.initials: P
authors.lastname: Roquetti-Fernandes
authors.forename: Maria
authors.initials: M
authors.lastname: Irany-Knackfuss
mesh_terms: D000293:Adolescent; D000328:Adult; D000704:Analysis of Variance; D001938:Brazil; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D008962:Models, Theoretical; D010101:Oxygen Consumption; D010809:Physical Fitness; D011897:Random Allocation; D012044:Regression Analysis