Influence of technique on upper body force and power production during medicine ball throws |
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| Authors: | Mark GL Sayers Silvio Lorenzetti |
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| Institution: | 1. School of Health and Sport Sciences, University of the Sunshine Coast, Maroochydore DC, Australiamsayers@usc.edu.au https://orcid.org/0000-0001-6275-8982;3. Institute for Biomechanics, ETH, Zurich, Switzerland;4. Swiss Federal Institute of Sport, Magglingen, Switzerlandhttps://orcid.org/0000-0002-8339-8960 |
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| Abstract: | ABSTRACTThis project examined the interrelationships between power production and upper body kinematics during a series of medicine ball push-press (MBP-P) throws. Twenty-five regular weight trainers (body mass = 86 ± 10 kg) performed a series of ballistic vertical MBP-P throws at loads representing 5% and 10% of their assessed 5RM bench press. Throws were performed lying supine on a force platform (1 kHz) with upper body kinematics assessed using standard infra-red motion capture techniques (0.5 kHz). Gross measures of performance and power production such as peak vertical ball velocity (Velpeak), peak force (Fpeak) and power (Ppeak) were recorded during the propulsive phase of the movement. Comparative analyses indicated that despite significant reductions in Velpeak from the 5% to 10% loads (P < 0.001), Fpeak remained largely unchanged (P = 0.167). Analysis of inter-trial variability showed that the gross measures of performance and power were relatively stable (Coefficient of Variation CV%] <13%), while most upper limb segmental kinematics varied considerably between trials (CV% up to 70%). This project highlights the complexity of the relationships between power production and upper body kinematics during light load ballistic MBP-P throwing. Additionally, it shows how trained athletes can achieve similar outcomes during ballistic movements using a variety of movement strategies. |
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| Keywords: | Power testing dynamic strength ballistic strength |
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![ORCID Icon]({"type":"image","src":"/templates/jsp/images/orcid.png"} "ORCID Icon")
https://orcid.org/0000-0001-6275-8982;3. Institute for Biomechanics, ETH, Zurich, Switzerland;4. Swiss Federal Institute of Sport, Magglingen, Switzerland