The study purpose was to develop a technology of programming for strength and strength endurance development in middle-school-aged girls in a 4-week physical training cycle. Materials and methods. The study participants were girls of 6th grade (n = 23), 7th grade (n = 20), 8th grade (n = 27). The paper used analysis and generalization of data of scientific and methodological literature, pedagogical testing, and methods of mathematical statistics for processing research results. The study

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... ls were processed by the IBM SPSS 23 statistical analysis software. The following parameters were calculated: arithmetic mean (X); standard deviation (s). The probability of difference in statistical indicators was estimated using the Student's t-test. Results. The analysis of the study results demonstrated that after using a combined method of strength development (1–6 classes), the experimental group girls showed a statistically significant improvement in results in the set of tests (p < 0.05). After using a circuit training method (7–12 classes), the experimental group girls also showed a statistically significant improvement in results in the set of tests (p < 0.05). During the experiment, the 6th-8th grade girls of the control group showed no statistically significant improvement in test results for most parameters (p > 0.05). Conclusions. When using the combined method of strength development (1–6 classes) and the circuit training method (7–12 classes) in a 4-week physical training cycle, the middle-school-aged girls showed positive dynamics of strength and strength endurance development of shoulder muscles, abdominal and back muscles, leg muscles.