Sex-Specific Differences in Fit Between Two Different Types of Body Armour: A Pilot Study
Abstract
Introduction: Body armour, whilst improving wearer survivability, can negatively impact physical performance and increase injury risk. These impacts may differ between male and female personnel due to the generic design of armour systems. The aim of this study was to assess sex-specific differences in comfort when wearing military (MBA) and law enforcement (LEBA) body armour. Methods: Using a prospective, within-subjects, repeated measures, randomized cross-over design, 10 police officers (female=6: male=4) wore each set of body armour. After completing a variety of tasks, officers provided feedback on a subjective mannequin sketch and provided free text comments. Results: The heavier MBA received more negative comments than LEBA. The majority of negative comments by female officers referred to: (a) discomfort around the throat and shoulders, particularly when seated (six comments), (b) the vest compressing the utility belt or holster (six comments); (c) compression of the stomach and back (two comments); (d) restrictions in breathing and range of motion (four comments), (e) reduced ability to perform tasks (two comments); and (f) ill-fitting design (two comments). In comparison, male officers reported: (a) discomfort around the shoulders and abdomen (five comments), particularly when seated (three of the five comments); and (b) hip discomfort (e.g., pinching) (two comments). Conclusion: Comfort and fit of body armour should not be considered the same between males and females. Industries need to consider these sex-specific differences in their research and design. Agencies should investigate potential differences between sexes and between systems when purchasing such systems.
References
Benyamina Douma, N., Côté, C., & Lacasse, A. (2018). Occupational and ergonomic factors associated with low back pain among car-patrol police officers. Clin J Pain, 34(10), 960-966.
Carlton, S. D., Carbone, P. D., Stierli, M., & Orr, R. M. (2014). The impact of occupational load carriage on the mobility of the tactical police officer. Journal of Australian Strength and Conditioning, 21(1), 32-37.
Coltman, C. E., Brisbine, B. R., Molloy, R. H., Ball, N. B., Spratford, W. A., & Steele, J. R. (2021). Identifying problems that female soldiers experience with current-issue body armour. Appl Ergon, 94, 103384.
Coltman, C. E., Brisbine, B. R., Molloy, R. H., & Steele, J. R. (2022). Can smaller body armour improve thoracolumbar range of motion and reduce interference when female soldiers perform dynamic tasks? Appl Ergon, 98, 103602. https://doi.org/10.1016/j.apergo.2021.103602
Coltman, C. E., Brisbine, B. R., & Steele, J. R. (2021). Bra-body armour integration, breast discomfort and breast injury associated with wearing body armour. Ergon, 64(12), 1623-1633.
Coltman, C. E., Steele, J. R., Spratford, W. A., & Molloy, R. H. (2020). Are female soldiers satisfied with the fit and function of body armour? Appl Ergon, 89, 103197.
Dempsey, P. C., Handcock, P. J., & Rehrer, N. J. (2013). Impact of police body armour and equipment on mobility. Appl Ergon, 44(6), 957-961. https://doi.org/10.1016/j.apergo.2013.02.011
Fargo, M. V., & Konitzer, L. N. (2007). Meralgia paresthetica due to body armor wear in US soldiers serving in Iraq: a case report and review of the literature. Mil Med, 172(6), 663-665.
Habersaat, S. A., Geiger, A. M., Abdellaoui, S., & Wolf, J. M. (2015). Health in police officers: Role of risk factor clusters and police divisions. Soc Sci Med, 143, 213-222. https://doi.org/10.1016/j.socscimed.2015.08.043
Joseph, A., Wiley, A., Orr, R., Schram, B., & Dawes, J. J. (2018). The impact of load carriage on measures of power and agility in tactical occupations: A critical review. Int J Environ Res Public Health, 15(1), 88.
Knapik, J. J., Reynolds, K., Orr, R., & Pope, R. (2017). Load carriage-related paresthesias (Part 2): Meralgia paresthetica. J Spec Oper Med, 17(1), 94-100.
Kukic, F., Koropanovski, N., Jankovic, R., Cvorovic, A., Dawes, J., Lockie, R., Orr, R. M., & Dopsaj, M. (2020). Association of sex-related differences in body composition to change of direction speed in police officers while carrying load. Int I Morphol, 731-736.
Larsen, L. B., Andersson, E. E., Tranberg, R., & Ramstrand, N. (2018). Multi-site musculoskeletal pain in Swedish police: associations with discomfort from wearing mandatory equipment and prolonged sitting. Int Arch Occup Environ Health, 91, 425-433.
Malbon, C., Knock, C., Critchley, R., & Carr, D. J. (2020). The effect of breast size and bra type on comfort for UK female police officers wearing body armour. Appl Ergon, 84, 103012.
Niemczyk, S. E., Arnold, L., & Wang, L. (2020). Incompatible functions: Problems of protection and comfort identified by female police officers required to wear ballistic vests over bras. Int J Fash Des Technol Educ, 13(2), 165-172.
Orr, R. M., Kukić, F., Čvorović, A., Koropanovski, N., Janković, R., Dawes, J., & Lockie, R. (2019). Associations between fitness measures and change of direction speeds with and without occupational loads in female police officers. Int J Environ Res Public Health, 16(11), 1947.
Orr, R. M., Pope, R., Coyle, J., & Johnston, V. (2015). Occupational loads carried by Australian soldiers on military operations. J Health Saf Environ, 31(1), 451-467.
Orr, R. M., Schram, B., & Pope, R. (2018). A Comparison of Military and Law Enforcement Body Armour. Int J Environ Res Public Health, 15(2). https://doi.org/10.3390/ijerph15020339
Orr, R. M., Simas, V., Canetti, E., Maupin, D., & Schram, B. (2019). Impact of various clothing variations on firefighter mobility: A pilot study. Safety, 5(4), 78.
Schram, B., Hinton, B., Orr, R., Pope, R., & Norris, G. (2018). The perceived effects and comfort of various body armour systems on police officers while performing occupational tasks. Ann Occup Environ Med, 30, 15. https://doi.org/10.1186/s40557-018-0228-x
Schram, B., Orr, R., Hinton, B., Norris, G., & Pope, R. (2020). The effects of body armour on mobility and postural control of police officers. J Bodyw Mov Ther, 24(3), 190-194.
Schram, B., Orr, R., Hinton, B., Pope, R., & Norris, G. (2019). The effects of body armour on the power development and agility of police officers. Ergon, 62(10), 1349-1356.
Toma, D., Niculescu, C., Săliştean, A., Luca, D., Popescu, G., Popescu, A., Lăzăroaie, C., Său, C., & Istrate, M. (2016). Improved fit and performance of female bulletproof vests. International Conference on Advanced Materials and Systems (ICAMS),
Tomes, C., Orr, R. M., & Pope, R. (2017). The impact of body armor on physical performance of law enforcement personnel: a systematic review. Ann Occup Environ Med, 29, 14. https://doi.org/10.1186/s40557-017-0169-9
Wiley, A., Joseph, A., Orr, R., Schram, B., Kornhauser, C. L., Holmes, R. J., & Dawes, J. J. (2020). The impact of external loads carried by police officers on vertical jump performance. Int J Exerc Sci, 13(6), 1179.