DOI QR코드

DOI QR Code

Changes of Lower Limb Joints Stiffness with Gait Speed in Knee Osteoarthritis

무릎 골관절염 환자의 보행속도에 따른 하지 관절 강성 변화

  • 박희원 (한국과학기술원 기계공학과) ;
  • 박수경 (한국과학기술원 기계공학과)
  • Received : 2012.04.27
  • Accepted : 2012.05.23
  • Published : 2012.07.01

Abstract

Spring-like leg models have been employed to explain various dynamic characteristics in human walking. However, this leg stiffness model has limitations to represent complex motion of actual human gait, especially the behaviors of each lower limb joint. The purpose of this research was to determine changes of total leg stiffness and lower limb joint stiffness with gait speed in knee osteoarthritis. Joint stiffness defined as the ratio of the joint torque change to the angular displacement change. Eight subjects with knee osteoarthritis participated to this study. The subject walked on a 12 m long and 1 m wide walkway with three sets of four different randomly ordered gait speeds, ranging from their self-selected speed to maximum speed. Kinetic and kinematic data were measured using three force plates and an optical marker system, respectively. Joint torques of lower limb joints calculated by a multi-segment inverse dynamics model. Total leg and each lower limb joint had constant stiffness during single support phase. The leg and hip joint stiffness increased with gait speed. The correlation between knee joint angles and torques had significant changed by the degree of severity of knee osteoarthritis.

Keywords

Acknowledgement

Supported by : 한국연구재단

References

  1. Garcia, M., Chatterjee, A., and Ruina, A., "The simplest walking model: Stability, complexity, and scaling," Journal of Biomechanical Engineering, Vol. 120, No. 2, pp. 281-286, 1998. https://doi.org/10.1115/1.2798313
  2. Kuo, A. D., "Energetics of actively powered locomotion using the simplest walking model," Journal of Biomechanical Engineering, Vol. 124, No. 1, pp. 113-120, 2002. https://doi.org/10.1115/1.1427703
  3. Yeom, J. and Park, S., "A gravitational impulse model predicts collision impulse and mechanical work during a step-to-step transition," Journal of Biomechanmics, Vol. 44, No. 1, pp. 59-67, 2011. https://doi.org/10.1016/j.jbiomech.2010.08.024
  4. Geyer, H., Seyfarth, A., and Blickhan, R., "Compliant leg behavior explains basic dynamics of walking and running," Proceedings of the Royal Society B: Biological Sciences, Vol. 273, No. 1603, pp. 2861- 2867, 2006. https://doi.org/10.1098/rspb.2006.3637
  5. Lipfert, S., Seyfarth, A., and Blickhan, R., "Leg stiffness in walking and running," American Society of Biomechanics 29th Annual Meeting, p. 35, 2005.
  6. Rebula, J. R., O'Connor, S. M., and Kuo, A. D., "Human walking and running: It's all in the redirection," Dynamic Walking, 2009.
  7. Kim, S. and Park, S., "Leg stiffness increases with speed to modulate gait frequency and propulsion energy," Journal of Biomechanics, Vol. 44, No. 7, pp. 1253-1258, 2011. https://doi.org/10.1016/j.jbiomech.2011.02.072
  8. Baliunas, A. J., Hurwitz, D. E., Ryals, A. B., Karrar, A., Case, J. P., Block, J. A., and Andriacchi, T. P., "Increased knee joint loads during walking are present in subjects with knee osteoarthritis," Osteoarthritis and Cartilage, Vol. 10, No. 7, pp. 573- 579, 2002. https://doi.org/10.1053/joca.2002.0797
  9. Winter, D. A., "Biomechanics and Motor Control of Human Movement, 4th Edition," Wiley, pp. 83-86, 2009.

Cited by

  1. A study on the standard of healing forest size for application of forest area on wellness -focused on urban area- vol.13, pp.6, 2015, https://doi.org/10.14400/JDC.2015.13.6.297
  2. Reproduction of Walking Asymmetry in Knee Osteoarthritis with Split-Belt Conditions vol.32, pp.10, 2015, https://doi.org/10.7736/KSPE.2015.32.10.885