Dynamic analysis of the resultant force acting on the hip joint during level walking.
The present study was designed to determine the resultant force acting on the hip joint during walking using a new dynamic analysis method. Our model utilized joint motion, ground reaction force, and muscle strength data from 18 women (6 normal women aged 20-24 years, 6 normal women aged 50-57 years, and 6 female patients with osteoarthritis, aged 50-66 years). We analyzed the resultant force using the multibody dynamic analysis system. To determine the factors that influence the force acting on the hip, we examined the effect of age and total hip arthroplasty. The maximum resultant force acting on the femoral head was dependent on the subject body weight and correlated with muscle strength and walking speed. The results of this study highlight the agreement between computer simulation analysis and actual measurement of the resultant force acting on the hip. Our results suggest that muscle strength and walking speed are significant determinants of the resultant force acting on the hip.
Hashimoto
Naoki
N
Division of Orthopaedics and Rehabilitation Medicine, Department of Surgery, University of Fukui Faculty of Medicine, Matsuoka, Fukui, Japan. nhassy@fmsrsa.fukui-med.ac.jp
Ando
Masao
M
Yayama
Takafumi
T
Uchida
Kenzo
K
Kobayashi
Shigeru
S
Negoro
Kohei
K
Baba
Hisatoshi
H
D000328:Adult; D000368:Aged; D019644:Arthroplasty, Replacement, Hip; D003198:Computer Simulation; D005260:Female; D006621:Hip Joint / Q000502:physiology* / Q000503:physiopathology; D006801:Humans; D008875:Middle Aged; D015207:Osteoarthritis, Hip / Q000503:physiopathology* / Q000601:surgery; D011182:Postoperative Care; D016896:Treatment Outcome; D016138:Walking / Q000502:physiology*