Effects of External Conditions to Chaotic Properties of Human Stability

Abstract

Human balance is one of the main tasks, that the human body needs to perform. This ability is crucial for performing daily activities and its examinations can be used for the prediction of falls in elderly people. It is important to analyse, and understand the way, how the body can achieve this state. In this paper, the data obtained from the force platform were examined. The investigated experiment consists of steady standing on a force plate for 60 s during the different condition of vision and surface. From these data, maximal Lyapunov exponents were calculated and the effects of test conditions were analysed.