title: Criterion-Related Validity of the Distance- and Time-Based Walk/Run Field Tests for Estimating Cardiorespiratory Fitness: A Systematic Review and Meta-Analysis.
abstract: OBJECTIVE
  The main purpose of the present meta-analysis was to examine the criterion-related validity of the distance- and time-based walk/run tests for estimating cardiorespiratory fitness among apparently healthy children and adults.
  
  
  METHODS
  Relevant studies were searched from seven electronic bibliographic databases up to August 2015 and through other sources. The Hunter-Schmidt's psychometric meta-analysis approach was conducted to estimate the population criterion-related validity of the following walk/run tests: 5,000 m, 3 miles, 2 miles, 3,000 m, 1.5 miles, 1 mile, 1,000 m, ½ mile, 600 m, 600 yd, ¼ mile, 15 min, 12 min, 9 min, and 6 min.
  
  
  RESULTS
  From the 123 included studies, a total of 200 correlation values were analyzed. The overall results showed that the criterion-related validity of the walk/run tests for estimating maximum oxygen uptake ranged from low to moderate (rp = 0.42-0.79), with the 1.5 mile (rp = 0.79, 0.73-0.85) and 12 min walk/run tests (rp = 0.78, 0.72-0.83) having the higher criterion-related validity for distance- and time-based field tests, respectively. The present meta-analysis also showed that sex, age and maximum oxygen uptake level do not seem to affect the criterion-related validity of the walk/run tests.
  
  
  CONCLUSIONS
  When the evaluation of an individual's maximum oxygen uptake attained during a laboratory test is not feasible, the 1.5 mile and 12 min walk/run tests represent useful alternatives for estimating cardiorespiratory fitness. As in the assessment with any physical fitness field test, evaluators must be aware that the performance score of the walk/run field tests is simply an estimation and not a direct measure of cardiorespiratory fitness.
authors.affiliation: Department of Physical Education and Sport, University of Granada, Granada, Spain.
authors.forename: Daniel
authors.initials: D
authors.lastname: Mayorga-Vega
authors.affiliation: Department of Physical Education and Sport, University of Granada, Granada, Spain.
authors.forename: Raúl
authors.initials: R
authors.lastname: Bocanegra-Parrilla
authors.affiliation: Faculty of Sciences of Physical Culture, Autonomous University of Chihuahua, Chihuahua, Mexico.
authors.forename: Martha
authors.initials: M
authors.lastname: Ornelas
authors.affiliation: Department of Physical Education and Sport, University of Granada, Granada, Spain.
authors.forename: Jesús
authors.initials: J
authors.lastname: Viciana
mesh_terms: D000328:Adult; D002648:Child; D005080:Exercise Test / Q000379:methods*; D006304:Health Status; D006801:Humans; D010101:Oxygen Consumption / Q000502:physiology; D010809:Physical Fitness / Q000502:physiology*; D012420:Running / Q000502:physiology*; D016138:Walking / Q000502:physiology*