Change Analysis in the cosmonaut's reference reactions before and after flight

A. S. Maslov, A. A. Kislitsyn


Abstract: The paper presents a statistical analysis of time series of biometric data obtained during locomotor tests of astronauts in conditions of the Earth and weightlessness. The aim of the study is to evaluate the dynamics of changes in locomotor functions based on the analysis of support reactions recorded from a treadmill when performing a standardized movement protocol. Indicative statistics are constructed and tested, such as: a reference step pattern, a number of residuals after subtracting patterns from individual steps in the L1 norm, and a consistent level of stationarity. As part of the study, a stable algorithm for segmentation of steps was proposed, and the effectiveness of the technique for diagnosing locomotor changes was demonstrated.

Keywords: biometric data analysis, locomotor functions, weightlessness, space flight.