Knowing the particularities of 9-10-year-old children, we believe that intervention with appropriate methods and means can be useful in bringing to fruition some opportunities that these developmental windows offer at this age. We performed a classic pedagogical experiment with two groups (an experimental group and a control group) in the 2021-2022 school year, in which 36 third- and fourth-grade students were involved (9-10 years old). The psycho-motor activities were performed within the afterschool program, 3 times a week, taking into account the global project elaborated by us. Through the activities performed in the Ș.D.Ș. system, the aim was to integrate the acquisition of a psycho-motor nature into specific actions that would strengthen the state of health, prevent the onset of deficiencies, develop the general motor capacity, and increase the effort capacity. Both at the beginning of the research and at its end, we applied a series of tests and control samples to subjects from the experimental control groups, with the help of which we determined the level of physical development, mortuary capacity, and morpho-functional indices. Comparing the results of the two groups, we obtained significantly better values for the subjects from the experimental group in a series of tests and trials, i.e., in the "Ruffier Test" for girls and in the "Hexagon Test" and endurance running for boys. The achieved progress suggests that the psychomotor activities performed in the S.A.S system and the completion of the compulsory physical education hours, considerably contribute to the physical development and the capacity for effort. [ABSTRACT FROM AUTHOR]