title: Measured maximal oxygen uptake in a multi-stage shuttle test and treadmill-run test in trained athletes.
abstract: OBJECTIVE
  The aims of the study were: i) to compare the measured maximal oxygen uptake (MVO2max) during the 20 m multi-stage shuttle test (MST) with MVO2max during an incremental treadmill-run test (TRT), and ii) to establish the reliability of MVO2max during MST, in trained athletes.
  
  
  METHODS
  
  
  
  METHODS
  8 well-trained endurance-athletes (END) and 8 athletes involved in team games (GAM) performed the MST twice (i.e. MST1 and MST2) and the TRT once, in 3 separate sessions.
  
  
  METHODS
  MVO2maxx attained in the MST and TRT was measured using a portable respiratory analyser (model K4 RQ, Cosmed).
  
  
  RESULTS
  MVO2max attained in the MST and TRT were significantly different for the END athletes (4.1+/-0.28 vs 4.45+/-0.31 Lxmin-1, P<0.05) but not for GAM athletes (4.01+/-0.51 vs 4.1+/-0.59 Lxmin-1, P>0.05). The 95% limits of agreement for MVO2max in the MST in Lxmin-1 were -0.67 to 0.27. MVO2max in MST1 and MST2 were not significantly different for END athletes (4.18+/-0.39 vs 4.1+/-0.28 Lxmin-1, P>0.05) and GAM athletes (4.01+/-0.55 vs 4.01+/-0.51 Lxmin-1, P>0.05). Reliability indicators for MVO2max in Lxmin-1 for MST test-retest were: typical error (TE)=0.14, coefficient of variation (CV)=3.5 and intra-class correlation (ICC)=0.90.
  
  
  CONCLUSIONS
  MVO2max in the MST was lower than that measured in the TRT for the END athletes but not for the GAM athletes. Sport-specificity was an important consideration, especially when testing END athletes for VO2max. MVO2max in the MST showed acceptable levels of reproducibility.
authors.affiliation: Human Performance Laboratory, Sports Medicine and Research Center, Singapore Sports Council, Singapore. abdul_rashid_aziz@ssc.gov.sg
authors.forename: A R
authors.initials: AR
authors.lastname: Aziz
authors.forename: M Y H
authors.initials: MY
authors.lastname: Chia
authors.forename: K C
authors.initials: KC
authors.lastname: Teh
mesh_terms: D000328:Adult; D019411:Clinical Laboratory Techniques; D005080:Exercise Test; D006801:Humans; D008297:Male; D010101:Oxygen Consumption / Q000502:physiology*; D010807:Physical Endurance / Q000502:physiology*; D015203:Reproducibility of Results; D013177:Sports / Q000502:physiology*