title: Reliability and validity of the 30-s continuous jump test for anaerobic fitness evaluation.
abstract: OBJECTIVE
  To determine the test-retest reliability and concurrent validity of the 30-s continuous jump (CJ30) test using the Wingate test as a reference.
  
  
  METHODS
  Descriptive validity study.
  
  
  METHODS
  Twenty-one male volleyball players (23.8 ± 3.8 years; 82.5 ± 9.1 kg; 185 ± 4.7 cm) were tested in three separate sessions. The first and second sessions were used to assess the reliability of the CJ30 while in the third session the Wingate test was performed. In the continuous jump test, consisting of maximal continuous jumps performed for 30s, jump height was determined by video kinematic analysis. Blood samples were collected after each test to determine lactate concentration.
  
  
  RESULTS
  The CJ30 showed excellent test-retest reliability for the maximal jump height (ICC = 0.94), mean vertical jump height (ICC = 0.98) and fatigue index (ICC = 0.87). Peak lactate showed moderate reliability (ICC = 0.45). Large correlations were found between the mean height of the first four jumps of CJ30 and the peak power of the Wingate (r = 0.57), between the mean vertical jump height of CJ30 and the mean power of the Wingate (r = 0.70) and between the lactate peak of CJ30 and Wingate (r = 0.51). A moderate correlation of fatigue index between CJ30 and the Wingate was found (r = 0.43).
  
  
  CONCLUSIONS
  The continuous jump is a reliable test and measures some of the same anaerobic properties as WAnT. The correlations observed in terms of anaerobic indices between the tests provide evidence that the CJ30 may adequately assess anaerobic performance level.
authors.affiliation: Biomechanics Laboratory, Federal University of Santa Catarina, Florianópolis, Santa Catarina, Brazil. Electronic address: juliano.dp@hotmail.com.
authors.forename: Juliano
authors.initials: J
authors.lastname: Dal Pupo
authors.affiliation: Biomechanics Laboratory, Federal University of Santa Catarina, Florianópolis, Santa Catarina, Brazil.
authors.forename: Rodrigo G
authors.initials: RG
authors.lastname: Gheller
authors.affiliation: Biomechanics Laboratory, Federal University of Santa Catarina, Florianópolis, Santa Catarina, Brazil.
authors.forename: Jonathan A
authors.initials: JA
authors.lastname: Dias
authors.affiliation: Sector of Biological Sciences, Physical Education Department/Center for Motor Behaviour Studies, Federal University of Paraná, Curitiba, Paraná, Brazil.
authors.forename: André L F
authors.initials: AL
authors.lastname: Rodacki
authors.affiliation: Biomechanics Laboratory, Federal University of Santa Catarina, Florianópolis, Santa Catarina, Brazil.
authors.forename: Antônio R P
authors.initials: AR
authors.lastname: Moro
authors.affiliation: Biomechanics Laboratory, Federal University of Santa Catarina, Florianópolis, Santa Catarina, Brazil.
authors.forename: Saray G
authors.initials: SG
authors.lastname: Santos
mesh_terms: D000328:Adult; D000693:Anaerobiosis; D005080:Exercise Test; D006801:Humans; D008297:Male; D010809:Physical Fitness; D015203:Reproducibility of Results; D055815:Young Adult
keywords: Athletic performance; Biomechanics; Exercise test; Plyometric exercise