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 (2009) 08, 584 - 590

Research article
Noninvasive Determination of Knee Cartilage Deformation During Jumping
Nenad Filipovic1,3, , Radun Vulovic1, Aleksandar Peulic1, Radivoje Radakovic1, Djordje Kosanic2, Branko Ristic1,4
Author Information
1 Bioengineering Research and Development Center, BioIRC,
2 Sport Center “Mladost”,
3 Faculty of Mechanical Engineering University of Kragujevac,
4 Medical Faculty Kragujevac, University of Kragujevac, Kragujevac, Serbia

Nenad Filipovic
✉ Faculty of Mechanical Engineering, University of Kragujevac, Sestre Janjica 6, 34000 Kragujevac, Serbia
Email: fica@kg.ac.rs
Publish Date
Received: 20-06-2009
Accepted: 11-09-2009
Published (online): 01-12-2009
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ABSTRACT

The purpose of this investigation was to use a combination of image processing, force measurements and finite element modeling to calculate deformation of the knee cartilage during jumping. Professional athletes performed jumps analyzed using a force plate and high-speed video camera system. Image processing was performed on each frame of video using a color recognition algorithm. A simplified mass-spring-damper model was utilized for determination of global force and moment on the knee. Custom software for fitting the coupling characteristics was created. Simulated results were used as input data for the finite element calculation of cartilage deformation in the athlete’s knee. Computer simulation data was compared with the average experimental ground reaction forces. The results show the three-dimensional mechanical deformation distribution inside the cartilage volume. A combination of the image recognition technology, force plate measurements and the finite element cartilage deformation in the knee may be used in the future as an effective noninvasive tool for prediction of injury during jumping.

Key words: Simulation, athletes, injury.


           Key Points
  • Even there are many existing mathematical models of force distribution during running or jumping (Liu et al, ), to our knowledge there is no interdisciplinary approach where imaging processing, finite element modeling and experimental force plate system are employed.
  • The aim is to explore noninvasive deformation in the knee cartilage during athlete’s jumping on the force plate.
  • An original image algorithms and software were developed as well as complex mathematical models using high-performance computational power of finite element modeling together with one-dimensional dynamics model.
  • The initial results showed cartilage deformation in the knee and future research will be focused on the methodology and more precisely determination of the stress and strain distribution in the knee cartilage during training phase of sportsman.
 
 
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