The daily diet of high school adolescents depends on their level of physical activity. Students who engage in sports, such as judo, require more energy, protein, and micronutrients to support muscle recovery and overall health. Adjusting the diet to the intensity of exercise is crucial for ensuring the appropriate amount of calories, hydration, and nutrient balance. Edible oils are crucial in the diet of high school students; the fatty acids they contain aid in muscle recovery after judo training and support heart and brain health. They also facilitate the absorption of fat-soluble vitamins, which is essential for both active athletes and physically inactive students. Regular consumption of edible oils contributes to maintaining a balanced diet, healthy cholesterol levels, and counteracting inflammatory conditions. The aim of this study was to analyze the role of edible oils in the diet of high school students, both those who regularly practice judo and those who do not engage in additional physical activity. It was hypothesized that judo practitioners would have different nutritional needs and benefits compared to non-athletes. The study employed a questionnaire to assess dietary views and habits, KomPAN data processing procedures, and the International Physical Activity Questionnaire (IPAQ) to evaluate physical activity. The results indicate a relationship between a healthy diet and judo training, with 68% of judo students having a higher Healthy Diet Index (HDI) and 66% maintaining a healthier BMI compared to their less-active peers. Additionally, a correlation was found between the influence of judo training on the lifestyle of high school students and their dietary knowledge and habits, with 79% of judo athletes demonstrating better nutrition awareness and healthier eating patterns compared to 67% of physically inactive individuals. The presented results highlight the need for efforts to increase nutritional knowledge among high school students, as well as actions to enrich their diet with edible oils.