Journal of Sports Science and Medicine
Journal of Sports Science and Medicine
ISSN: 1303 - 2968   
Ios-APP Journal of Sports Science and Medicine
Androit-APP Journal of Sports Science and Medicine
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©Journal of Sports Science and Medicine (2020) 19, 264 - 270

Research article
Influences of Lateral Jump Smash Actions in Different Situations on the Lower Extremity Load of Badminton Players
Chia-Ling Hung1, Min-Hao Hung2, Chi-Yao Chang2, Hsin-Huan Wang2, Chin-Shan Ho2, Kuo-Chuan Lin3, 
Author Information
1 Department of Physical Medicine and Rehabilitation, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan, R.O.C
2 Graduate Institute of Sports Science, National Taiwan Sport University, Taoyuan, Taiwan, R.O.C
3 Office of Physical Education, Chung Yuan Christian University, Taoyuan, Taiwan, R.O.C

Kuo-Chuan Lin
‚úČ Office of Physical Education, Chung Yuan Christian University, Taoyuan, Taiwan. 200, Chung Pei Rd, Chung Li, Taiwan 32023, R.O.C
Email: misvbeverydayc@gmail.com
Publish Date
Received: 25-07-2019
Accepted: 19-02-2020
Published (online): 01-05-2020
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ABSTRACT

Badminton atypical actions and hitting movements often occur during the game; therefore, many special footwork methods have been developed to facilitate the rapid movements required to hit the shuttlecock, including quick turning and jumping and quick directional change movements. Studies have shown that the majority of badminton sport injuries occur in the lower extremity joints of athletes. The purpose of this study was to investigate the influences of hitting motion and unanticipated hitting direction on landing mechanics after backhand lateral jump smashing and landing to analyze joint stiffness and torque changes in three lower extremity joints. Recruited sixteen badminton athletes.The capture frequency of the Vicon Motion System (300Hz), Kistler force platform (1500Hz) and Vicon Nexus Version 1.8.5 software were used simultaneously to capture the kinematic and kinetic parameter of backhand side lateral jump smash footwork. The swing actions were divided into two situations, shadow (footwork and racket swinging practice without targets) and hitting (footwork and stroke shuttlecock) actions, whereas the directions were divided into directional and non-directional. Two-way repeated measures ANOVA with the LSD correction was used to compare the differences among the four conditions. The significance level was set to a = 0.05. Results shown that, at the peak of torque, the ankle plantar flexion of the non-directional shadow (p < 0.05) were greater than that of directional shadow (p < 0.05); meantime, ankle torque change of non-directional shadow (p < 0.05) and directional hitting (p < 0.05) was lower than that of non-directional hitting, but the non-directional hitting was larger compared to non-directional shadow (p < 0.05) at the maximum vertical GRF. The hip extension at peak of torque of directional hitting were larger than that of non-directional shadow (p < 0.05). The shadow actions hip flexion angle was larger than that of directional hitting at initial contact, but the non-directional hitting hip abduction was has the significant difference among all the conditioning. The hip flexion angle of non-directional shadow was larger than that of directional hitting (p < 0.05), the hip abduction angle of the non-directional hitting was greater than that of non-directional shadow (p < 0.05) at the peak VGRF. Elite badminton players execute different training movements; the joint stiffness was in the same state. In the hitting actions has greater ankle and hip joint torque than shadow actions. The badminton player was change joint range of motion to adjust lower limbs stiffness.

Key words: Lower extremity joint stiffness, internal joint torque, footwork training, jump landing


           Key Points
  • In different training situations will exhibit the same joint stiffness, because badminton player was change joint range of motion to adjust lower limbs stiffness.
  • From the joint angle and joint torque, the hitting action will have a greater risk of injury and high lower extremity load.
 
 
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