Bujang, Agus Rusdiana, Samsudin, Moch Asmawi, Firmansyah Dlis, Dindin Abidin, Aridhotul Haqiyah
The purpose of study was to analyse the effect of core muscle fatigue on changes in kinematic parameters during jump serve in volleyball. In this study, the participants were sixteen experienced male volleyball player volunteers, with an average age, height and body weight of 24.6 ± 1.8 years, 1.85 ± 1.6m and 79.5 ± 3.5kg, respectively. This study utilised two high-resolution digital video cameras, a drone video camera, three-dimensional calibration, 3D motion analysis software, a lactate analyser, a heart rate monitoring system, and a radar speed gun. Meanwhile, the eight kinematic parameters analysed at the approach, plant and jump phases showed that the ball speed decreased significantly in the fatigue condition, compared to the non-fatigue counterpart. There was a significant difference in the jump phase duration, step length and jump height variables for the fatigue and non-fatigue conditions during the jump serve in volleyball. Furthermore, the six kinematic parameters analysed in the maximal shoulder external rotation phase showed that a significant difference in fatigue and non-fatigue conditions was found in the shoulder external rotation and backward trunk tilt parameters. Meanwhile, in the maximum angular velocity phase in the upper limb joint, during the jump serve, it was found that the shoulder internal rotation variable decreases significantly in the fatigue condition, compared to the non-fatigue counterpart. Additionally, in the trunk rotation and forward trunk tilt, a significant decrease in the upper limb joint maximum angular velocity was observed in the fatigue condition during the volleyball jump serve. © 2021, Drustvo Pedagoga Tjelesne i Zdravstvene Kulture. All rights reserved.
Physical Education, Health and Recreation Study Program, Islam 45 Bekasi University, Indonesia; Sport Science Study Program, Faculty of Sport and Health Education, Indonesia University of Education, Indonesia; Physical Education Study Program, State University of Jakarta, Indonesia
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