Background: Laboratory assessment of maximal oxygen uptake (VO2max) is physically and mentally draining for the athlete and requires expensive laboratory equipment. Indirect measurement of VO2max could provide a practical alternative to laboratory testing. Purpose: To examine the relationship between the maximal power output (MPO) in an individualized 7 × 2-minute incremental test (INCR-test) and VO2max and to develop a regression equation to predict VO2max from MPO in female rowers. Methods: Twenty female club and Olympic rowers (development group) performed the INCR-test on a Concept2 rowing ergometer to determine VO2max and MPO. A linear regression analysis was used to develop a prediction of VO2max from MPO. Cross-validation analysis of the prediction equation was performed using an independent sample of 10 female rowers (validation group). Results: A high correlation coefficient (r = .94) was found between MPO and VO2max. The following prediction equation was developed: VO2max (mL·min-1) = 9.58 × MPO (W) + 958. No difference was found between the mean predicted VO2max in the INCR-test (3480 mL·min-1) and the measured VO2max (3530 mL·min-1). The standard error of estimate was 162 mL·min-1, and the percentage standard error of estimate was 4.6%. The prediction model only including MPO, determined during the INCR-test, explained 89% of the variability in VO2max. Conclusion: The INCR-test is a practical and accessible alternative to laboratory testing of VO2max.
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