Aim of the study: The goal is to examine engagement in physical activity considering the age of the respondents and their differences, as well as the factors that potentially interfere with engaging in physical activity. Study design: A cross-sectional study was conducted. Participants and methods: The research was conducted on 111 respondents in the city of Osijek. The respondents were divided in two age groups. One age group included respondents from 18 to 30 years of age while the other group included respondents aged 30 and over. The data was collected through an anonymous survey questionnaire using Google forms. An online anonymous survey, which is the work of the author and consists of 26 questions, was used. Informed consent was obtained from all the included participants. Statistical methods were used to process the collected data. Results: Based on the answers of the respondents in the online survey, demographic characteristics, basic characteristics, lifestyle habits and level of physical activity, as well as differences in physical activity between the two age groups, were determined. The factors stated by the respondents to have the greatest influence on not engaging in physical activity are working hours, household chores, family responsibilities and childcare. Also, a significant difference was observed between the age groups of the respondents and the intensity and duration of physical activities. Conclusion: The majority of respondents of both age groups are engaged in some form of physical activity, and those who do not engage in physical activity or engage in physical activity less often, are more often members of the older age group. As cited by the respondents, the most frequent reasons for this are: lack of free time due to work, household and family obligations, and childcare. The research showed that members of the younger age group engage in more difficult forms of physical activity and spend more than 60 minutes per training session compared to the older age group.