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http://dx.doi.org/10.5103/KJSB.2015.25.1.029

The Biomechanical Properties of the Shock Absorption Phase during Drop Landing According to Landing Types  

Park, Gu-Tae (Devision of Sport Science, College of Arts and Physical Education, Incheon National University)
Yoo, Kyoung-Seok (Division of Sports and Leisure Studies, School of Arts and Physical Education, Chodang University)
Publication Information
Korean Journal of Applied Biomechanics / v.25, no.1, 2015 , pp. 29-37 More about this Journal
Abstract
Objective : The purpose of this study was to investigate the biomechanical properties of shock absorption strategy and postural stability during the drop landing for each types. Methods : The motions were captured with Vicon Motion Capture System, with the fourteen infra-red cameras (100Hz) and synchronized with GRF(ground reaction force) data(1000Hz). Ten male soccer players performed a drop landing with single-leg and bi-legs on the 30cm height box. Dependent variables were the CoM trajectory and the Joint Moment. Statistical computations were performed using the paired t-test and ANOVA with Turkey HSD as post-hoc. Results : The dominant leg was confirmed to show a significant difference between the left leg and right leg as the inverted pendulum model during Drop Landing(Phase 1 & Phase 2). One-leg drop landing type had the higher CoM displacement, the peak of joint moment with the shock absorption than Bi-leg landing type. As a lower extremity joint kinetics analysis, the knee joint showed a function of shock absorption in the anterior-posterior, and the hip joint showed a function of the stability and shock absorption in the medial-lateral directions. Conclusion : These findings indicate that the instant equilibrium of posture balance(phase 1) was assessed by the passive phase as Class 1 leverage on the effect of the stability of shock absorption(phase 2) assessed by the active phase on the effect of Class 2 leverage. Application : This study shows that the cause of musculo-skeletal injuries estimated to be focused on the passive phase of landing and this findings could help the prevention of lower damage from loads involving landing related to the game of sports.
Keywords
Shock Absorption; Stability; Balance; Dominant Leg;
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Times Cited By KSCI : 5  (Citation Analysis)
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