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Original articles  EXERCISE PHYSIOLOGY AND BIOMECHANICS


The Journal of Sports Medicine and Physical Fitness 2005 September;45(3):306-14

Copyright © 2009 EDIZIONI MINERVA MEDICA

lingua: Inglese

Measured maximal oxygen uptake in a multi-stage shuttle test and treadmill-run test in trained athletes

Aziz A. R. 1, Chia M. Y. H. 2, Teh K. C. 1

1 Human Performance Laboratory, Sports Medicine and Research Center, Singapore Sports Council, Singapore
2 Physical Education and Sports Science Academic Group National Institute of Education Nanyang Technological University, Singapore


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Aim. The aims of the study were: i) to compare the measured maximal oxygen uptake (MV.O2max) during the 20 m multi-stage shuttle test (MST) with MV.O2max during an incremental treadmill-run test (TRT), and ii) to establish the reliability of MV.O2max during MST, in trained athletes.
Methods. Experimental design: 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. Measures: MV.O2max attained in the MST and TRT was measured using a portable respiratory analyser (model K4 RQ, Cosmed).
Results. MV.O2max attained in the MST and TRT were significantly different for the END athletes (4.1±0.28 vs 4.45±0.31 L·min-1, P<0.05) but not for GAM athletes (4.01±0.51 vs 4.1±0.59 L·min-1, P>0.05). The 95% limits of agreement for MV.O2max in the MST in L·min-1 were -0.67 to 0.27. MV.O2max in MST1 and MST2 were not significantly different for END athletes (4.18±0.39 vs 4.1±0.28 L·min-1, P>0.05) and GAM athletes (4.01±0.55 vs 4.01±0.51 L·min-1, P>0.05). Reliability indicators for MV.O2max in L·min-1 for MST test-retest were: typical error (TE) = 0.14, coefficient of variation (CV) = 3.5 and intra-class correlation (ICC) = 0.90.
Conclusion. MV.O2max 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 V.O2max. MV.O2max in the MST showed acceptable levels of reproducibility.

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