The increasement of frequency of chronic non-contagious diseases is the cause of the scientists’ ever increasing interest in promoting of the implementation of regular physical activity and proper nutrition, especially when children and young people are concerned, in order to gain positive life habits from the early stage of life. Physical activity is the main link in preserving and improving of health, in the improving of mental and cognitive capacities and developing of the sport spirit. The human body needs continuous movement because of the health prevention and improvement from childhood to old age. Unfortunately, presently the physical activity is insufficient and eating habits are poor. With insufficient physical activity, the cause of non-contagious chronical diseases is an improper diet which as a consequence can provoke diabetes, cardiovascular diseases, osteoporosis, obesity as well as malignant diseases. Properly balanced nutrition and adequate physical activity can preserve and improve our health. The scope of this research has been to prove that persons who perform their physical activity regularly are more careful when choosing of the type of food - therefore feed themselves more properly. The research has included 100 respondents, 60 women and 40 men, at the age of 20 to 35 years old. The results obtained show that regularly physically active persons rarely choose fast high calorie food and give advantage to proper and balanced nutrition, which consequently as a result has a normal body mass index. The preservation and improvement of health has been recognised as the main reason for physical activity and properly balanced nutrition. It can therefore be concluded that the awareness of the population about the importance of the physical activity and proper nutrition for preservation and improvement of health has been increasing.