The article analyzes the importance of developing a healthy lifestyle among high school girls and the role of the "Fitness Mix" methodology in this process. The study explores the use of "Fitness Mix" as an innovative tool for enhancing physical activity levels, improving performance, and promoting overall health among adolescents. It emphasizes how combining different types of physical activities, such as aerobics, strength training, and stretching, can be integrated into physical education classes to achieve comprehensive results. In addition to physical exercises, the article highlights the importance of the theoretical component, which includes principles of healthy eating, regular sleep and rest routines, prevention of harmful habits, and maintaining mental health. Special attention is given to the analysis of scientific research and practical examples that confirm the effectiveness of using fitness technologies in schools. Alternatives to traditional modular physical education programs are discussed, broadening the opportunities for educating and developing adolescents. The study emphasizes the need to consider individual student characteristics when designing exercise programs, ensuring optimal results and maintaining motivation for regular physical activity. The article also provides recommendations for educators and trainers on implementing «Fitness Mix» into the school curriculum to promote the development of sustainable healthy lifestyle habits among youth. A range of examples is analyzed regarding the combination of different types of physical activity, specifically aerobics, strength exercises, stretching, etc., with an additional focus on important aspects such as healthy eating principles, sleep and rest routines, prevention of harmful habits, and mental health preservation. The importance of considering the individual characteristics of students when designing exercise programs is underscored.