The objective of the study was to demonstrate the positive impact of body strength workout program on the development of strength abilities at middle school aged girl (11-12 years). During the twelve weeks on selected group of girls (N=31) has been applied an exercise program, which included a diagnosis of power abilities. The results of this pilot study show that the inclusion of regular ten-workout program in school physical education has a positive effect on the level of the strength abilities of girls 6-grade. The program is most useful in the context of thematic whole gymnastics.