Falling poses a major threat to the steadily growing population of the elderly in modern-day
society. A major challenge in the prevention of falls is the identification of individuals who …

Background Motorized treadmills are widely used in research or in clinical therapy. Small
kinematics, kinetics and energetics changes induced by Treadmill Walking (TW) as …

Background: Maintaining a healthy gait into old age is key to preserving the quality of life
and reducing the risk of falling. Nonlinear dynamic analyses (NDAs) are a promising method …

Background Gait and balance problems are common in patients with multiple sclerosis,
leading to high risk for falls. Local Dynamic Stability (LDS), a non-linear gait stability index …

In this paper, a cell phone and a three dimension accelerometer are used to develop a
simple fall risk prediction system. Accelerometer offers a practical and low cost method of …

Lyapunov exponents can indicate the asymptotic behaviors of nonlinear systems, and thus
can be used for stability analysis. However, it is notoriously difficult to estimate these …

The concept of Lyapunov exponents has been mainly used for analyzing chaotic systems,
where at least one exponent is positive. The methods for calculating Lyapunov exponents …

Nonlinear time series analysis was used to estimate maximal Lyapunov exponents of select
ankle and knee kinematics during three different conditions of treadmill walking …

Background Complex foot and ankle fractures, such as calcaneum fractures or Lisfranc
dislocations, are often associated with a poor outcome, especially in terms of gait capacity …

The aim of this study was to compare gait stability and variability between walking conditions
and age groups. Methods: Twenty-six healthy younger and older females participated. Trunk …