The collision forces and lower-extremity inter-joint coordination during running |
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| Authors: | Li-I Wang Chin-Yi Gu I-Lin Wang Sheng-Wun Siao Szu-Ting Chen |
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| Institution: | 1. Department of Physical Education and Kinesiology, National Dong Hwa University, Hualien, Taiwan;2. Department of Education and Human Potentials Development, National Dong Hwa University, Hualien, Taiwan;3. Department of Life Science and the Institute of Biotechnology, National Dong Hwa University, Hualien, Taiwan |
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| Abstract: | The purpose of this study was to compare the lower extremity inter-joint coordination of different collision forces runners during running braking phase. A dynamical system approach was used to analyse the inter-joint coordination parameters. Data were collected with six infra-red cameras and two force plates. According to the impact peak of the vertical ground reaction force, twenty habitually rearfoot-strike runners were categorised into three groups: high collision forces runners (HF group, n = 8), medium collision forces runners (MF group, n = 5), and low collision forces runners (LF group, n = 7). There were no significant differences among the three groups in the ankle and knee joint angle upon landing and in the running velocity (p > 0.05). The HF group produced significantly smaller deviation phase (DP) of the hip flexion/extension-knee flexion/extension during the braking phase compared with the MF and LF groups (p < 0.05). The DP of the hip flexion/extension-knee flexion/extension during the braking phase correlated negatively with the collision force (p < 0.05). The disparities regarding the flexibility of lower extremity inter-joint coordination were found in high collision forces runners. The efforts of the inter-joint coordination and the risk of running injuries need to be clarified further. |
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| Keywords: | Dynamical system landing loading phase angle variability |
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