**5. Conclusions**

Our study confirmed correlations between diet, physical activity and body mass index, fat mass index, visceral fat level, and bone mineral density in male border guard officers. Higher body mass and fat mass were correlated with poorer dietary habits, i.e., low consumption of fruit, vegetables, dairy, nuts, grains, as well as with lower leisure-time physical activity and longer time spent sitting during the day.

There is a strong need for further monitoring of health-related behaviors among border guard officers due to the many dietary mistakes and abnormalities in nutritional status that were observed. It is also necessary to provide nutritional education and encourage officers to follow dietary recommendations.

**Supplementary Materials:** The following supporting information can be downloaded at: https:// www.mdpi.com/article/10.3390/ijerph19095305/s1, Table S1: Food consumption frequency; Table S2: Relationships between diet (FFQ) and body mass index (BMI), fat mass index (FMI), visceral fat level (V Fat L), and bone mineral density (BMD T-score).

**Author Contributions:** Conceptualization, A.A. and J.B.; Data curation, A.A.; Formal analysis, A.A.; Funding acquisition, J.B.; Investigation, A.A., R.Ł., T.L., E.M., E.S., A.T., I.B. and J.B.; Methodology, A.A. and J.B.; Project administration, J.B.; Resources, A.A. and A.T.; Software, J.B.; Supervision, A.A.; Visualization, A.A.; Writing—original draft, A.A.; Writing—review & editing, A.A. All authors have read and agreed to the published version of the manuscript.

**Funding:** The research was financed by the University of Economics and Human Sciences in Warsaw and Ministry of Health in 2016–2020 as part of the National Health Program (agreement 518/2016/DA).

**Institutional Review Board Statement:** The study was conducted in accordance with the Declaration of Helsinki and approved by the Ethics Committee of the Military Institute of Hygiene and Epidemiology (1/XXI/2016).

**Informed Consent Statement:** Informed consent was obtained from all subjects involved in the study.

**Data Availability Statement:** The data presented in this study are available on request from the corresponding author. The data are not publicly available due to privacy/ethical restrictions.

**Acknowledgments:** The authors sincerely thank all border guard officers who participated in the study.

**Conflicts of Interest:** The authors declare no conflict of interest.
