Currently, we are increasingly observing students with incorrect posture and, consequently, their exemption from Physical and sports education classes, which results in an increase in various health problems and the deterioration of their postural health. The aim of the research was to apply a 5-month intensive exercise program within the framework of an, Active school” to a group of female students from an experimental group (N = 148) with poor and incorrect posture. The experimental group consisted of female students with an average age of 14.32 ± 0.2 years, body weight of 59.42 ± 3.6 kg, and height of 164.9 ± 3.3 kg. In terms of data acquisition and processing methods, standardized methods available for school practice were applied. The results in the experimental group, in contrast to the control group (N = 146), indicate significant (p < 0.01, 0.05) and qualitative changes in posture, individual segments of posture, the muscular system-upper and lower crossed syndrome, as well as a reduction in body weight in conjunction with posture. The pilot findings of the project are subject to further, more exact monitoring and evaluation from the perspective of linking theory to practice within the Active School framework. VEGA 1/0301/25.