title: Field and laboratory testing in young elite soccer players.
abstract: OBJECTIVE
  To determine if there are correlations between the physical fitness of young soccer players assessed by field and laboratory testing.
  
  
  METHODS
  Thirty four male soccer players took part in the study (mean (SD) age 17.5 (1.1) years, height 177.8 (6.7) cm, weight 70.5 (6.4) kg). Maximal oxygen uptake (VO(2)MAX) during treadmill running and vertical jump height on a force platform were measured in the laboratory. Field tests consisted of a soccer specific endurance test (Bangsbo test) and 30 m sprint with 10 m lap times.
  
  
  RESULTS
  The Bangsbo test correlated with the lowest velocity associated with VO(2)MAX (vVO(2)MAX; R(2) = 0.55, p<0.001), but not with VO(2)MAX. Sprint times at 30 m and 20 m were related to peak extension velocity and peak extension force measured during vertical jumping, but not to vertical jump height per se. The jumping force and velocity could explain 46% of the 30 m sprint performance (R(2) = 0.46, p<0.001).
  
  
  CONCLUSIONS
  The Bangsbo test and 30 m sprint test correlate with vVO(2)MAX and vertical jump force and velocity respectively. The Bangsbo test does not give a good estimate of VO(2)MAX in young soccer players.
authors.affiliation: National Centre of Sports Medicine, El Menzah, Tunisia.
authors.forename: K
authors.initials: K
authors.lastname: Chamari
authors.forename: Y
authors.initials: Y
authors.lastname: Hachana
authors.forename: Y B
authors.initials: YB
authors.lastname: Ahmed
authors.forename: O
authors.initials: O
authors.lastname: Galy
authors.forename: F
authors.initials: F
authors.lastname: Sghaïer
authors.forename: J-C
authors.initials: JC
authors.lastname: Chatard
authors.forename: O
authors.initials: O
authors.lastname: Hue
authors.forename: U
authors.initials: U
authors.lastname: Wisløff
mesh_terms: D000293:Adolescent; D000886:Anthropometry; D005080:Exercise Test / Q000379:methods*; D006339:Heart Rate / Q000502:physiology; D006801:Humans; D008297:Male; D010101:Oxygen Consumption / Q000502:physiology; D010807:Physical Endurance / Q000502:physiology; D010809:Physical Fitness / Q000502:physiology*; D015203:Reproducibility of Results; D012916:Soccer / Q000502:physiology*