title: Yo-Yo IR1 vs. incremental continuous running test for prediction of 3000-m performance.
abstract: BACKGROUND
  This study aimed to compare physiological responses during the Yo-Yo intermittent recovery level 1 (Yo-Yo IR1) Test and an incremental continuous running field Test (ICRT) and to analyze their predictive value on 3000-m running performance.
  
  
  METHODS
  Forty moderately trained individuals (18 females) performed the ICRT and Yo-Yo IR1 Test to exhaustion. The ICRT was performed as graded running test with an increase of 2.0 km·h-1 after each 3 min interval for lactate diagnostic. In both tests, blood lactate levels were determined after the test and at 2 and 5 min of recovery. Heart rate (HR) was recorded to monitor differences in HR slopes and HR recovery.
  
  
  RESULTS
  Comparison revealed a correlation between ICRT and Yo-Yo IR1 Test performance (R2=0.83, P<0.001), while significant differences in HRmax existed (Yo-Yo IR1, 189±10 bpm; ICRT, 195±16 bpm; P<0.005; ES=0.5). Maximum lactate levels were also different between test (Yo-Yo IR1, 10.1±2.1 mmol∙L-1; ICRT, 11.7±2.4 mmol∙L-1; P<0.01; ES=0.7). Significant inverse correlations were found between the Yo-Yo IR1 Test performance and 3000 m running time (R2=0.77, P<0.0001) as well as the ICRT and 3000 m time (R2=0.90, P<0.0001).
  
  
  CONCLUSIONS
  Our data suggest that ICRT and Yo-Yo IR1 test are useful field test methods for the prediction of competitive running performances such as 3000-m runs but maximum HR and blood lactate values differ significantly. The ICRT may have higher predictive power for middle- to long- distance running performance such as 3000-m runs offering a reliable test for coaches in the recruitment of athletes or supervision of training concepts.
authors.affiliation: Institute of Sports Medicine, Molecular Genetics of Cardiovascular Disease, University Hospital Münster, Münster, Germany - boris.schmitz@ukmuenster.de.
authors.forename: Boris
authors.initials: B
authors.lastname: Schmitz
authors.affiliation: Department of Physical Education and Sports History, University of Münster, Münster, Germany.
authors.forename: Andreas
authors.initials: A
authors.lastname: Klose
authors.affiliation: Internal Medicine D, Nephrology, Hypertension and Rheumatology, University Hospital Münster, Münster, Germany.
authors.forename: Katrin
authors.initials: K
authors.lastname: Schelleckes
authors.affiliation: Institute of Sports Medicine, Molecular Genetics of Cardiovascular Disease, University Hospital Münster, Münster, Germany.
authors.forename: Charlotte M
authors.initials: CM
authors.lastname: Jekat
authors.affiliation: Department of Physical Education and Sports History, University of Münster, Münster, Germany.
authors.forename: Michael
authors.initials: M
authors.lastname: Krüger
authors.affiliation: Institute of Sports Medicine, Molecular Genetics of Cardiovascular Disease, University Hospital Münster, Münster, Germany.
authors.forename: Stefan-Martin
authors.initials: SM
authors.lastname: Brand
mesh_terms: D000328:Adult; D003430:Cross-Sectional Studies; D005080:Exercise Test / Q000379:methods*; D005260:Female; D006339:Heart Rate / Q000502:physiology; D006801:Humans; D019344:Lactic Acid / Q000097:blood; D008297:Male; D010807:Physical Endurance / Q000502:physiology*; D012420:Running / Q000502:physiology*; D055815:Young Adult
chemical_list: D019344:Lactic Acid