The aim of investigation was to study of physical development and psychophysiological functions forming in children of young school age. Were studied 25 schoolchildren (12 girls and 13 boys) in 4 class of average school. Anthropometric and functional parameters as level of physical development were studied. In dynamics of school year were studied of psychic functions. The investigations are showed that process of learning provokes of fatigue and reflects on psychic functions efficiency as well as negative influence on physical development. The psychic functions forming characterized to gradual mobilization of new elements of functional system during school year in children of young school age.

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