Prediction of maximal oxygen uptake from a 20-m shuttle run as measured directly in runners and squash players

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Abstract
The aim of this study was to assess the validity of the multistage shuttle run test in predicting maximal oxygen uptake (VO 2 max) in athletes trained in sports with different physical demands. Over a 14-day period, 10 male long-distance runners (continuous high-intensity exercise) and 10 male squash players (intermittent high-intensity exercise) performed, in random order, the multistage shuttle run test and a maximal treadmill protocol of increasing elevation which elicited VO 2 max. Compared with direct measurement of VO 2 max, the shuttle run test significantly underpredicted the VO 2 max of the group of runners (n=10; Pn=20; P<0.01). The correlation (r) between VO 2 max determined by the shuttle run test and by the treadmill protocol was 0.61 (PVO 2 max are less robust than those reported in previous studies. Furthermore, our results indicate that there are sport-specific differences when predicting VO 2 max from the multistage shuttle run test.