title: The reliability of a 30-s sprint test on the Wattbike cycle ergometer.
abstract: OBJECTIVE
  To determine the reliability of a 30-s sprint cycle test on the Wattbike cycle ergometer.
  
  
  METHODS
  Over 3 consecutive weeks, 11 highly trained cyclists (mean ± SD; age 31 ± 6 y, mass 74.6 ± 10.6 kg, height 180.5 ± 8.1cm) completed four 30-s maximal sprints on a Wattbike ergometer after a standardized warm-up. The sprint test implemented a "rolling start" that consisted of a 60-s preload (at an intensity of 4.5 W/kg) before the 30-s maximal sprint. Variables determined across the duration of the sprint were peak power (Wpeak), mean power (Wmean), W/kg, mean cadence (rpm), maximum heart rate (n = 10), and postexercise blood lactate.
  
  
  RESULTS
  The average intraclass correlation coefficients between trials (2v1, 3v2, 4v3, 4v1) were Wpeak .97 (90%CI .94-.99), Wmean .99 (90%CI .97-1.00), W/kg .96 (90%CI .91-.98), mean cadence .96 (90%CI .92-.99), maximum heart rate .99 (90%CI .97-.99), and postexercise blood lactate .94 (90%CI .87-.98). The average typical error of measurement (expressed as a CV% and absolute value between trials-2v1, 3v2, 4v3, 4v1) was Wpeak 4.9%, 52.7 W; Wmean 2.4%, 19.2 W; W/kg 2.3%, 0.18 W/kg; mean cadence 1.4%, 1.6 rpm; maximum heart rate 0.9%, 1.6 beats/min; and postexercise blood lactate 4.6%, 0.48 mmol/L.
  
  
  CONCLUSIONS
  A 30-s sprint test on the Wattbike cycle ergometer is highly reproducible in trained cyclists.
authors.affiliation: Australian Institute of Sport, Belconnen, ACT, Australia.
authors.forename: Matthew W
authors.initials: MW
authors.lastname: Driller
authors.forename: Christos K
authors.initials: CK
authors.lastname: Argus
authors.forename: Cecilia M
authors.initials: CM
authors.lastname: Shing
mesh_terms: D000328:Adult; D054874:Athletic Performance / Q000502:physiology; D005080:Exercise Test / Q000379:methods*; D006339:Heart Rate / Q000502:physiology; D006801:Humans; D019344:Lactic Acid / Q000097:blood; D005082:Physical Exertion / Q000502:physiology; D015203:Reproducibility of Results
chemical_list: D019344:Lactic Acid