title: Cardiorespiratory Fitness and Body Composition of Soccer Referees; Do These Correlate With Proper Performance?
abstract: BACKGROUND
  The elite-level referee is exposed to similar physical demands to those placed on a midfield soccer player. They have an important responsibility to implement the rules of the game. So, good health and performance of soccer referees have a great importance.
  
  
  OBJECTIVE
  The purpose of this study was to assess the cardiorespiratory fitness and body composition of all 78 soccer referees officiating at the Iranian Premier League and determine the correlation between these parameters and performance.
  
  
  METHODS
  In a cross-sectional study, all referees selected for the competitions were enrolled. Participants underwent exercise stress test, pulmonary function test and body composition assessment. Then the weekly scores of each referee, assessed by qualified supervisors of national federation were obtained using the FIFA standard form throughout the season (34 weeks) and registered.
  
  
  RESULTS
  Among 78 participants (including 32 center and 46 side referees), mean and standard deviation of age, body mass index, percent of body fat, VO2max and performance scores were 37 ± 3.8, 23.6 ± 2.1, 20.7 ± 3.9, 59.9 ± 7.1 and 85.8 ± 0.25, respectively. No significant correlation between referees' mean score and selected parameters were found.
  
  
  CONCLUSIONS
  It seems that the acquired scores of top-class referees may be influenced by multiple factors other than the laboratory findings of cardiopulmonary fitness and body composition.
authors.affiliation: Sports Medicine Research Center, Tehran University of Medical Sciences (TUMS), Tehran, IR Iran; Department of Sports and Exercise Medicine, Tehran University of Medical Sciences (TUMS), Tehran, IR Iran.
authors.forename: Reza
authors.initials: R
authors.lastname: Mazaheri
authors.affiliation: Sports Medicine Research Center, Tehran University of Medical Sciences (TUMS), Tehran, IR Iran; Department of Sports and Exercise Medicine, Tehran University of Medical Sciences (TUMS), Tehran, IR Iran.
authors.forename: Farzin
authors.initials: F
authors.lastname: Halabchi
authors.affiliation: Sports Medicine Research Center, Tehran University of Medical Sciences (TUMS), Tehran, IR Iran; Department of Sports and Exercise Medicine, Tehran University of Medical Sciences (TUMS), Tehran, IR Iran.
authors.forename: Tohid
authors.initials: T
authors.lastname: Seif Barghi
authors.affiliation: Department of Epidemiology and Biostatistics, School of Public Health, Tehran University of Medical Sciences, Tehran, IR Iran.
authors.forename: Mohammad Ali
authors.initials: MA
authors.lastname: Mansournia
keywords: Anthropometry; Athletic Performance; Body Mass Index; Football; Physical Conditioning