The paper introduces a new method for ground-reaction forces (GRF) analysis for the evaluation of cosmonaut locomotor functions stability after a long-duration spaceflight (LDSF). The method is based on the analysis of GRF profiles obtained before and after LDSF by standard БД-2 treadmill reaction force data readings. Following probabilistic indicators were introduced: distributions of step and step-phase duration probabilities, their extremums, standard deviations and inverse coefficients of variety; step structure variability; the non-stationarity index for step durations arrays; GRF pattern, its width and maximum. Every indicator of one cosmonaut pilot study has changed drastically after LDSF. The new statistics provided appeared to be promising indicators of locomotor function state. A further trial of the new method may provide new knowledge of human movement strategies alterations after LDSF and may establish it as a standard analytical procedure for personalized flight assistance after its reliability verification.

本文介绍了一种新的地面反作用力 (GRF) 分析方法，用于评估长期航天 (LDSF) 后宇航员的运动功能稳定性。该方法基于通过标准 БД-2 跑步机反作用力数据读数对 LDSF 前后获得的 GRF 剖面进行分析。引入了以下概率指标：阶跃和阶跃阶段持续时间概率的分布、它们的极值、标准偏差和反变量系数；阶梯结构变异性；步骤持续时间数组的非平稳指数；GRF 模式，其宽度和最大值。在 LDSF 之后，一项宇航员试点研究的每一项指标都发生了巨大变化。提供的新统计数据似乎是运动功能状态的有希望的指标。