*Limitations*

As stated by the Polish researchers, the respondents' self-completion of the questionnaires led to some overestimation of the type and duration of efforts [37]. So, this seems to be the biggest limitation of our research. However, it should be emphasized that the respondents were instructed in detail before filling in the questionnaires. When filling in the questionnaires, the respondents had the opportunity to ask the interviewer questions. Another limitation reported by researchers is the use of the long version of IPAQ instead of the short version. The respondent is forced to spend a longer time completing the questionnaire. In our opinion, it does not seem that the time needed to complete the IPAQ was long enough to discourage respondents from filling in the questionnaire diligently. Moreover, the long version of the IPAQ is recommended in scientific research, especially when one of the forms of physical activity is carefully analyzed [38]. In our research, we tried to carefully analyze various forms of physical activity in different professional roles and age groups.
