The influence of landing mat composition on ankle injury risk during a gymnastic landing: a biomechanical quantification

• Autorzy: Xiao X. , Xiao W. , Li X. , Wan B. , Shan G.

Identyfikatory

DOI

10.5277/ABB-00583-2016-02

• Języki publikacji: EN

Abstrakty

EN

Purpose: About 70% injury of gymnasts happened during landing – an interaction between gymnast and landing mat. The most injured joint is the ankle. The current study examined the effect of mechanical properties of landing mat on ankle loading with aims to identify means of decreasing the risk of ankle injury. Method: Gymnastic skill – salto backward stretched with 3/2 twist was captured by two high-speed camcorders and digitized by using SIMI-Motion software. A subject-specific, 14-segment rigid-body model and a mechanical landing-mat model were built using BRG.LifeMODTM. The landings were simulated with varied landing-mat mechanical properties (i.e., stiffness, dampness and friction coefficients). Result: Real landing performance could be accurately reproduced by the model. The simulations revealed that the ankle angle was relatively sensitive to stiffness and dampness of the landing mat, the ankle loading rate increased 26% when the stiffness was increased by 30%, and the changing of dampness had notable effect on horizontal ground reaction force and foot velocity. Further, the peak joint-reaction force and joint torque were more sensitive to friction than to stiffness and dampness of landing mat. Finally, ankle muscles would dissipate about twice energy (189%) when the friction was increased by 30%. Conclusion: Loads to ankles during landing would increase as the stiffness and dampness of the landing mat increase. Yet, increasing friction would cause a substantial rise of the ankle internal loads. As such, the friction should be a key factor influencing the risk of injury. Unfortunately, this key factor has rarely attracted attention in practice.

Słowa kluczowe

EN

computer simulation; impact load; mechanical properties of floor mats; stiffness; dampness; friction

PL

symulacja komputerowa; właściwości mechaniczne; sztywność; tarcie

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Acta of Bioengineering and Biomechanics
• Rocznik: 2017
• Tom: Vol. 19, no. 1
• Strony: 105--113
• Opis fizyczny: Bibliogr. 25 poz., tab., wykr.

Twórcy

autor

Xiao X.

• School of Rehabilitation Medicine, Binzhou Medical University, Yantai, Shandong, China, 246005

autor

Xiao W.

• China Institute of Sport Science, Beijing, China, 100061

autor

Li X.

• Zhejiang Research Institute of Sports Science, Hangzhou, Zhejiang, China, 310004

autor

Wan B.

• School of Physical Education, Shaanxi Normal University, Xian, China, 710119
• Department of Kinesiology, University of Lethbridge, Canada

autor

Shan G.

• Department of Kinesiology, University of Lethbridge, Canada
• Department of Physical Education, Xinzhou Teachers’ University, Shanxi, China, 034000

Bibliografia

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Uwagi

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017).