The motor abilities of children and adolescents have their own patterns of development. Having the most reliable information about the peculiarities of age dynamics of motor abilities, it is possible to build an adequate, targeted system to ensure physical preparation of schoolchildren. We made an attempt to calculate indicators of dynamics of motor abilities of schoolchildren in accordance with the standards of one of the recommended programs (V.I. Lyakh, A.A. Zdanevich, 2011) in order to determine sensational periods of development of motor abilities of children and teenagers. The study determined absolute gains, growth rates, chain and baseline growth rates, and the value of 1 % growth. These indicators revealed age periods that are defined as «sensational» for a given motor capacity. The analysis of the standards showed that there are age periods in which the most intense growth of motor qualities of children and adolescents takes place. For boys, it is a period of 10 to 11 years and, to a lesser extent, 7 to 9 years; for girls, 7 to 8 years of age and, to a lesser extent, 11 to 12 years of age. Most intensively during the period from 7 to 17 years the power qualities increased (in boys - 3.8 times, in girls - 2.3 times) and flexibility (in boys - 2.6 times, in girls - 1.7 times). Speed and coordination qualities progressed least intensively (an average of 30 % for boys and 20 % for girls). The results of the study can be useful for teachers of physical culture in general education school, trainer's staff carrying out educational and training process with children and adolescent contingent.