As a result of the long-term adaptation of the body, the indicators of system-forming parameters (statokinetic stability, spectrum power, stability, stability index, dynamic component of balance) are revealed. The configuration of stabilogram, statokinesiogram, spectrum analysis, ballistic cardiogram was studied. It was established that the postural control of muscles was disturbed as a result of distal muscles fatigue compared to proximal muscles fatigue. The fatigue of the distal muscles of the ankle provokes proximal muscles recruitment of the knee and hip. The ratio of the decrease in the maximum group of extensors and the speed of decrease in the center of foot pressure increases significantly with a 30% loss of the ability of arbitrary contraction [1]. The study of motor activity (MA) applies to the system of sports reserve training with respect to age and sports qualification characteristics [2].
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