Physical ability is a comprehensive indicator of a person’s general functional state and motor abilities, which also depend on the level of development and manifestation of the primary motor skills. The study aims to determine students’ physical ability levels at the junior high school stage of education. Methods: research and analysis of literary sources on the problem and research conducted through the national system for assessing students’ physical ability, which included the following tests: 30-meter running, standing long jump, throwing a medicine ball, 200-meter shuttle run, and T-test. Fifty-three students, aged 12-13 years from 119 Secondary School ‘Acad. Mihail Arnaudov’ in the city of Sofia, were studied. All statistical operations were carried out by mathematical-statistical processing with SPSS.22 by applying variation analysis and statistical hypothesis testing. Results: The state of the physical ability of the examined students in this junior high school is at a good level. Conclusion: More attention should be paid to developing motor skills and their sensitive periods in physical education and sport lessons.