LOCOMOTION STRATEGIES AND INTENSITY OF SUPPORT REACTIONS AS AN APPROACH TO INDIVIDUALIZATION OF COUNTERMEASURES AGAINST THE NEGATIVE EFFECTS OF MICROGRAVITY

A search for optimal methods of planning cosmonaut's training is currently guided by the concept of the leading role of support afferentation in hypogravity-induced changes of locomotion. Support afferentation is dependent on the strength of support reactions (SR); in this connection, the investigation was aimed at analysis of the vertical component of maximal SR at identical speeds of different types of locomotion on motorized and nonmotorized treadmill in I g and micro-g. Minimal vertical components of maximal SR were, measured during walk on the motorized treadmill. Maximal vertical components of maximal SR were measured during run on the nonmotorized treadmill. This was observed regularly on ISS treadmill BD-2 outfitted with vibroisolation and a special training suit to produce axial loading. On the ground, the relationship was less regular. Considerable differences of individual locomotion strategies and maximal SR values imply that SR is a factor that must be taken into account when planning individual training programs for rnosmonaut on long-duration missions.