title: [Validation and reliability of the 1,000 meter aerobic test].
abstract: BACKGROUND
  In humans, measurement of maximum oxygen uptake is important because it is related to cardiovascular health. In Mexico there is scanty information in nationals and unfortunately such a data has been gathered from laboratory and field indirect methods ignoring reliability, validation and cross validation.
  
  
  OBJECTIVE
  This study was designed to determine the validity and reliability of the 1,000 meters walk-run test in adults.
  
  
  METHODS
  Fifty-one healthy subjects (31 men and 20 women) participated in four maximal tests; two in a laboratory on a treadmill for direct measurement of VO2max (L1 and L2) and twice in a track for distance walk-run time in 1,000 meters (C1 and C2). Values were analyzed by interclass correlation, Pearson product moment and "t" test.
  
  
  RESULTS
  The VO2max in L1 y L2 were 2.67 and 2.70 L.min-1, (R = 0.97) and 44.2 and 46.2 mL.kg-1.min-1, meanwhile VO2max estimated from field were 44.2 and 46.2 mL.kg-1.min-1, (R = 0.98). Pearson correlation obtained from all subjects between laboratory and field test was of r = 0.88, without significant difference (P > 0.05). From those data we development the following equation: VO2max = 71.66-5.85 (t), where 71.66 and 5.85 are constants and t is the time employ in performing the test, R = -0.86, (p < 0.05).
  
  
  CONCLUSIONS
  The 1,000 meters distance walk-run for time is highly reliable and valid test for estimation of VO2max in Mexican people. The test is safe, easy and short and can be administrated with a minimal amount of equipment. We propose its utilization in other population in order to perform cross validation.
authors.affiliation: Departamento de Fisiología y Medicina, Universidad de Guanajuato, México.
authors.forename: F J
authors.initials: FJ
authors.lastname: Díaz
authors.forename: J G
authors.initials: JG
authors.lastname: Montaño
authors.forename: M T
authors.initials: MT
authors.lastname: Melchor
authors.forename: J H
authors.initials: JH
authors.lastname: Guerrero
authors.forename: J A
authors.initials: JA
authors.lastname: Tovar
mesh_terms: D000328:Adult; D005080:Exercise Test; D005260:Female; D006801:Humans; D008297:Male; D010101:Oxygen Consumption