Regular physical activity is very important for the development of various physical qualities in humans. The process of formation of the quality of speed largely determines the success of a trainee in many sports. Assessment of its formation at age can help in effective training of different categories of athletes, including in game sports. Objective: to determine the course of quickness formation in athletes of game sports. Eighty-four male athletes were observed: adolescent and youth athletes. Soccer, volleyball and basketball players were observed during the study. Groups of 12 adolescents and 14 young men who had not previously participated in sports served as controls. The physical quality of speed was assessed in the 30-meter running test. Student's t-criterion was calculated. Soccer players had the highest speed among the sports specializations taken into account. They possessed more speed than volleyball and basketball players. The physically untrained had the weakest speed capabilities. The growth of quickness in adolescence compared to its level in adolescents was traced as they matured. The highest speed was possessed by soccer players among those examined. They showed greater development of quickness than volleyball and basketball players. As the age increased, quickness increased in all groups of observation.