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Differences in kick-leg kinematics in various side-kick heights
Yi-Chun Lin1,2, Wen-Tzu Tang2, Yi-Chien Peng2,3
1Xinyi Elementary School, New Taipei City, Taiwan.
European Journal of Sport Science
|May 23, 2023
Summary
Elite taekwondo athletes adjust lower extremity movement patterns for side-kicks at different target heights. Higher kicks involve increased linear velocities in the leg and pelvis, and rotational adjustments in the hip and pelvis.
Area of Science:
- Biomechanics
- Sports Science
- Kinesiology
Background:
- Taekwondo is a combat sport emphasizing dynamic kicking techniques.
- Understanding lower extremity kinematics is crucial for optimizing side-kick performance.
- Previous research has not fully explored kinematic variations across different target heights.
Purpose of the Study:
- To investigate how lower extremity kinematics change during the taekwondo side-kick at varying protective gear heights.
- To analyze differences in linear and angular velocities and joint angles based on kick height.
- To provide biomechanical insights for improving taekwondo kicking technique and strategy.
Main Methods:
- Twenty elite male taekwondo athletes participated.
- A three-dimensional (3D) motion capture system recorded kinematic data.
- Athletes performed side-kicks at three target heights adjusted to their body dimensions; data analyzed using one-way ANOVA (p < .05).
Main Results:
- Significant differences (p < .05) were found in peak linear velocities of the pelvis, hip, knee, ankle, and foot's center of gravity during the leg-lifting phase.
- Maximum angles for pelvis left tilting and hip abduction differed significantly across heights in both phases.
- Maximum angular velocities of pelvis left tilting and hip internal rotation varied significantly only in the leg-lifting phase.
Conclusions:
- Elite athletes increase linear velocities of the pelvis and lower extremity joints for higher side-kicks.
- Higher kicks involve specific rotational adjustments in the proximal segments (pelvis and hip) during the leg-lifting phase.
- Athletes can strategically modulate linear and rotational velocities to enhance kick accuracy and speed in competition.
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