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J Phys Ther Sci. 2015 Jun;27(6):1833-8. doi: 10.1589/jpts.27.1833. Epub 2015 Jun 30.

Age and gender differences in the control of vertical ground reaction force by the hip, knee and ankle joints.

Author information

1
Department of Rehabilitation, Kurashiki Heisei Hospital, Japan ; Graduate School of System Informatics, Kobe University, Japan.
2
Faculty of Sport and Health Science, Ritsumeikan University, Japan.
3
Graduate School of System Informatics, Kobe University, Japan.

Abstract

[Purpose] This study examined the relationships between joint moment and the control of the vertical ground reaction force during walking in the elderly and young male and female individuals. [Subjects and Methods] Forty elderly people, 65 years old or older (20 males and 20 females), and 40 young people, 20 to 29 years old (20 males and 20 females), participated in this study. Joint moment and vertical ground reaction force during walking were obtained using a 3D motion analysis system and force plates. Stepwise linear regression analysis determined the joint moments that predict the amplitude of the vertical ground reaction force. [Results] Knee extension moment was related to the vertical ground reaction force in the young males and females. On the other hand, in the elderly females, hip, ankle, and knee joint moments were related to the first peak and second peak forces, and the minimum value of vertical ground reaction force, respectively. [Conclusion] Our results suggest that the young males and females make use of the knee joint moment to control of the vertical ground reaction force. There were differences between the elderly and the young females with regard to the joints used for the control of the vertical ground reaction force.

KEYWORDS:

Elderly people; Lower extremity joint moment; Vertical ground reaction force

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