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Peak dynamic force in human gait |
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| Authors: | Sheldon R. Simon Igor L. Paul Joseph Mansour Michael Munro Peter J. Abernethy Eric L. Radin |
| Affiliation: | a Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, U.S.A. b The Department of Orthopedic Surgery, Harvard Medical School, Boston, Massachusetts, U.S.A. c Department of Orthopedic Surgery, West Virginia University, Morgantown, West Virginia, U.S.A. |
| Abstract: | Studies were made of the forces generated at heel stroke in human gait using both force plates having a high resonant frequencies (capable of picking up high frequency components in the contact force) as well as a force transducer inserted into the heel of the shoe of the subjects. The output traces were analyzed for the existence of high frequency impulsive loads during a normal walking cycle. The effect of the complicance of the foot and floor was studied with the force transducers. The results showed that during normal human gait the lower limb is subjected to a high frequency impulsive load at heel strike. The severity of this impulse varied with the individual, the velocity and angle with which the limb aproached the ground and the compliance of the two materials coming in contact at heel strike. The magnitude of this peak force varied from 0.5 to 1.25 times body weight and its frequency components from 10 to 75 Hz. |
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