Today, more and more people have a problem with sports habits, precisely because they do not realize the importance of physical activity that contributes to a better and healthier lifestyle. This thesis is based on the characteristics of participants at a fitness center in the city of Split. The Champion Fitness Center, where the survey was conducted, was selected to determine the athletes' athletic habits. Particular emphasis was placed on the students' motivation, their previous sports and eating habits. Also, it will be determined whether the participants engaged in some competitive sport and whether they consumed certain substances. The differences between the trainees in terms of the above factors will be analyzed. Physical inactivity is a big problem, both in the world and in Croatia. Regular physical activity contributes to a leaner body, but I am healthier to the same people. Every person who exercises regularly feels healthy and less susceptible to illness. The problem with today's world is the increasing real estate, which arises from the hectic lifestyle. Working in front of a computer and a day in the office, in most people causes the loss of the will to exercise, in no way does such thinking lead to obesity but also causes various other diseases. Physical activity, as well as a healthy diet, are the keys to health, but it is all a matter of human choice, awareness, and awareness of the potential adverse consequences. The list of maladies due to malnutrition is getting longer every day. Most believe that fast metabolism and good genetics contribute most to lean appearance, the true truth is that the reasons for good body shape lie in the habits of individuals.