Power Output Prediction From Jump Height and Body Mass Does Not Appropriately Categorize or Rank Athletes

Journal of Strength and Conditioning Research
Jonathan Ache-DiasAntônio R P Moro

Abstract

The purposes of this study were (a) to verify the agreement of categorization and ranks based on the actual power output measured by a force plate (PPact) and the estimated power output (PPest) from jump height and body mass (BM), and (b) to verify whether the ratio standard is adequate to scale the PPact for BM. The countermovement jumps of 309 male athletes were analyzed. The athletes were first categorized into tertiles (superior, intermediate, and inferior) according to PPact and PPest. After that the athletes were ranked (highest to lowest power output) according to PPact and PPest. The PPest equation explained 81% of PPact variance (standard error of estimate = 277.4 W). The PPest (3,757.1 ± 579.8 W) displayed similar mean values compared with PPact (3,757.1 ± 642.3 W). However, the agreement between the categories generated by PPact and PPest was only moderate (k = 0.6; p < 0.01), and in the intermediate tertile, the categorization differs 38.8%. The agreement between the ranks analyzed from a Bland-Altman plot shows bias zero, but a wide limits of agreement (81 ranks; 26.2%). For the PPact scaling, the ratio standard may be considered as an adequate method for removing the BM effect, considering the lack of correlation ...Continue Reading

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Citations

Jul 28, 2018·Journal of Strength and Conditioning Research·Ewertton de Souza BezerraAntônio Renato Pereira Moro
Oct 16, 2018·Applied Physiology, Nutrition, and Metabolism = Physiologie Appliquée, Nutrition Et Métabolisme·Renan Felipe Hartmann NunesLuiz Guilherme Antonacci Guglielmo
May 23, 2020·The Journal of Sports Medicine and Physical Fitness·Renan F Hartmann NunesLuiz G Guglielmo
Feb 22, 2018·Journal of Strength and Conditioning Research·Rafael L KonsJuliano Dal Pupo

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