On Different Methods for Calculating the Flight Height in the Vertical Countermovement Jump Analysis

Grabski, Jakub Krzysztof; Walczak, Tomasz; Michałowska, Martyna; Pastusiak, Patrycja; Szczetyńska, Marta

doi:10.1007/978-3-319-97286-2_22

Cited by 1 publication

(3 citation statements)

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“…The vertical component of COM velocity was estimated using the impulse-momentum method. Net impulse was obtained by integrating the net vertical ground reaction force using the trapezoid method (Buckthorpe et al, 2012;Grabski et al, 2019;Linthorne, 2001).…”

Section: Force Platformmentioning

confidence: 99%

“…Jump height (JH) has been considered an indicator of the vertical force applied during the countermovement jumps (CMJ) (Samozino et al, 2010). Most devices use flight time (FT) to calculate JH (Buckthorpe et al, 2012;Grabski et al, 2019;Linthorne, 2001;McMahon et al, 2016;Monnet et al, 2014). Any difference between the athlete's take-off and landing position could increase the FT but not the JH.…”

Section: Introductionmentioning

confidence: 99%

“…Considering this technical implication, take-off velocity has been suggested as a more suitable parameter for assessing JH (Jiménez-Reyes et al, 2016). This is calculated using the impulse-momentum method from records of a force platform (García-Ramos et al, 2015;Glatthorn et al, 2011;Grabski et al, 2019;Jiménez-Reyes et al, 2016;Linthorne, 2001;Taylor et al, 2010), and this method has been shown to be more precise compared to others using force platforms (Monnet et al, 2014). Due to the difficulty of determining the precise instant of take-off, the maximum velocity (Vmax) achieved during the upward movement has been proposed as another option (García-Ramos et al, 2015;Jiménez-Reyes et al, 2016;Taylor et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Maximum velocity during loaded countermovement jumps obtained with an accelerometer, linear encoder and force platform: A comparison of technologies

Ferro

Floría

Villacieros

et al. 2019

Journal of Biomechanics

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The maximum velocity (Vmax) reached during countermovement jumps (CMJ) has been considered a performance indicator to evaluate vertical jump ability. The aim of this study was to compare Vmax during loaded CMJ (CMJloaded) using three different technologies to show a criterion for selecting the more appropriate depending on its use. Nine recreationally active men performed a CMJloaded test. Five jumps were made in each of 6 series with a 20-kg barbell + 0, + 5, + 10, + 15, + 20 and + 25 kg, with 2 seconds rest between the jumps and 5 minutes rest between the series to explore a wide range of speeds. Vmax was obtained from force platform, inertial device and linear encoder technologies. Bland-Altman plots and mean differences were used to compare devices. Reproducibility was tested using the intraclass correlation coefficient (ICC) for single measures and typical error (TE). All technologies showed high levels of reproducibility, ICC higher than 0.75 and TE lower than 10 %. There were non-significant differences in Vmax between each pair of technologies (linear encoder 2.11 ± 0.24 mÁs-1 , accelerometer 2.11 ± 0.26 mÁs-1 , force platform 2.12 ± 0.24 mÁs-1) reporting a very low bias. However the limits of agreement between the different technologies evaluated were high (± 0.33 mÁs-1). In conclusion, the accelerometer, linear encoder and force platform were suitably reliable to be used to measure Vmax during loaded vertical jumps but their values were not interchangeable.

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Section: Force Platformmentioning

confidence: 99%