Journal of Biomechanical Engineering

Volume: Page/CID:

Sagittal Profile of the Femoral Condyles and Its Application to Femorotibial Contact Analysis
Measurements of the sagittal profiles of the articular surfaces of 24 femoral condyles were performed using a laser range finder. An algebraic algorithm was developed to reconstruct the measured sagit...

The Generalized Torque Approach for Analyzing the Results of Pedaling Tests
This paper deals with the analysis of experimental data obtained using an ergometer apparatus. A straightforward analysis method based on the power equation and the concept of generalized torques is p...

J. Biomech. Eng. / Volume 123 / Issue 1 / TECHNICAL PAPERS

Local Dynamic Stability Versus Kinematic Variability of Continuous Overground and Treadmill Walking

J. Biomech. Eng. -- February 2001 -- Volume 123, Issue 1, 27 (6 pages)
doi:10.1115/1.1336798

You are not logged into the ASME Digital Library.
Log in

ABSTRACT

REFERENCES (29)

CITING ARTICLES

Author(s):
J. B. Dingwell
Sensory Motor Performance Program, Rehabilitation Institute of Chicago, Chicago, IL 60611
Center for Locomotion Studies, Penn State University, University Park, PA 16802

J. P. Cusumano
Department of Engineering Science and Mechanics, Penn State University, University Park, PA 16802

P. R. Cavanagh
Center for Locomotion Studies; Department of Kinesiology, Penn State University, University Park, PA 16802

D. Sternad
Department of Kinesiology, Penn State University, University Park, PA 16802

Thisstudy quantified the relationships between local dynamic stability and variabilityduring continuous overground and treadmill walking. Stride-to-stride standard deviations werecomputed from temporal and kinematic data. Maximum finite-time Lyapunov exponentswere estimated to quantify local dynamic stability. Local stability ofgait kinematics was shown to be achieved over multiple consecutivestrides. Traditional measures of variability poorly predicted local stability. Treadmillwalking was associated with significant changes in both variability andlocal stability. Thus, motorized treadmills may produce misleading or erroneousresults in situations where changes in neuromuscular control are likelyto affect the variability and/or stability of locomotion.