| Autor: |
Sayers MG; School of Health and Sport Sciences, University of the Sunshine Coast, Maroochydore DC, Australia., Lorenzetti S; Institute for Biomechanics, ETH, Zurich, Switzerland.; Swiss Federal Institute of Sport, Magglingen, Switzerland. |
| Jazyk: |
angličtina |
| Zdroj: |
Journal of sports sciences [J Sports Sci] 2020 Feb; Vol. 38 (4), pp. 470-475. Date of Electronic Publication: 2019 Dec 19. |
| DOI: |
10.1080/02640414.2019.1706871 |
| Abstrakt: |
This 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 (Vel peak ), peak force (F peak ) and power (P peak ) were recorded during the propulsive phase of the movement. Comparative analyses indicated that despite significant reductions in Vel peak from the 5% to 10% loads ( P < 0.001), F peak 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. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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