[A study of the adaptation of the heart to physical loading in children of preschool age].
D000222:Adaptation, Physiological; D002648:Child; D002675:Child, Preschool; D006321:Heart / Q000502:physiology*; D006801:Humans; D005082:Physical Exertion / Q000502:physiology*
Issledovanie adaptatsii serdtsa k fizicheskoĭ nagruzke u deteĭ doshkol'nogo vozrasta.