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Please use this identifier to cite or link to this item: http://hdl.handle.net/10481/36689

Title: Predicting Vertical Jump Height from Bar Velocity
Authors: García-Ramos, Amador
Štirn, Igor
Padial Puche, Paulino
Argüelles-Cienfuegos, Javier
Fuente, Blanca de la
Strojnik, Vojko
Feriche, Belén
Issue Date: 2015
Abstract: The objective of the study was to assess the use of maximum (Vmax) and final propulsive phase (FPV) bar velocity to predict jump height in the weighted jump squat. FPV was defined as the velocity reached just before bar acceleration was lower than gravity (-9.81 m·s-2). Vertical jump height was calculated from the take-off velocity (Vtake-off) provided by a force platform. Thirty swimmers belonging to the National Slovenian swimming team performed a jump squat incremental loading test, lifting 25%, 50%, 75% and 100% of body weight in a Smith machine. Jump performance was simultaneously monitored using an AMTI portable force platform and a linear velocity transducer attached to the barbell. Simple linear regression was used to estimate jump height from the Vmax and FPV recorded by the linear velocity transducer. Vmax (y = 16.577x - 16.384) was able to explain 93% of jump height variance with a standard error of the estimate of 1.47 cm. FPV (y = 12.828x - 6.504) was able to explain 91% of jump height variance with a standard error of the estimate of 1.66 cm. Despite that both variables resulted to be good predictors, heteroscedasticity in the differences between FPV and Vtake-off was observed (r2 = 0.307), while the differences between Vmax and Vtake-off were homogenously distributed (r2 = 0.071). These results suggest that Vmax is a valid tool for estimating vertical jump height in a loaded jump squat test performed in a Smith machine.
Sponsorship: This study was supported by grants awarded by the Spanish Ministry of Science and Innovation (DEP2012-35774) and Ministry of Education, Culture and Sport (Predoctoral Grant FPU12/00360).
Publisher: Journal of Sports Science and Medicine
Keywords: Linear velocity transducer
Force platform
Jump performance
URI: http://hdl.handle.net/10481/36689
ISSN: 1303-2968
Citation: García-Ramos, A.; et al. Predicting Vertical Jump Height from Bar Velocity. Journal of Sports Science and Medicine, 14(2): 256-262 (2015). [http://hdl.handle.net/10481/36689]
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