A cross‐sectional analysis of the muscle strength, spinal shrinkage, and recovery during a working day of military police officers

Hoflinger, F ORCID: https://orcid.org/0000-0003-2420-7455, Rodacki, ALF ORCID: https://orcid.org/0000-0002-4585-497X, Tavares, JM, Fadel Neto, MI, Paulo, AC ORCID: https://orcid.org/0000-0001-7410-5110, Fowler, NE ORCID: https://orcid.org/0000-0001-7452-3056 and Rodacki, CLN ORCID: https://orcid.org/0000-0002-4828-6824 2021, 'A cross‐sectional analysis of the muscle strength, spinal shrinkage, and recovery during a working day of military police officers' , Journal of Occupational Health, 63 (1) , e12297.

PDF - Published Version
Available under License Creative Commons Attribution Non-commercial No Derivatives 4.0.

Download (528kB) | Preview


Objective: Military personnel has a large prevalence of back pain, especially those involved in patrolling routines, as they wear heavy protective equipment. Patrolling includes long periods of sustaining the protective equipment in a sitting or in a motor vehicle (motorcycle or car). Thus, understanding spinal loading of military police officers after patrolling by car (CAR; n = 14), motorcycle (MOT; n = 14), and administrative (ADM; n = 14) routines is relevant to establish preventive strategies. Methods: The torque of the trunk and working and anthropometric characteristics were assessed to explain spinal loading using stature variation measures. Precise stature measures were performed before and after a 6 h journey (LOSS) and 20 min after a resting posture (RECOV). The trunk extensor (PTE BM−1) and flexor (PTF BM−1) muscles' isometric peak torque were measured before the working journey. Results: The LOSS was similar between CAR and MOT (4.8 and 5.8 mm, respectively) after 6 h of patrolling. The ADM presented the lowest LOSS (2.8 mm; P < .05). No changes in RECOV between groups were observed (P > .05). Vibration may explain the greater spinal loading involved in patrolling in comparison to the ADM. A GLM analysis revealed that BMI was the only explanatory factor for stature loss. No independent variables explained RECOV. The ability of the trunk muscles to produce force did not influence LOSS or RECOV. Conclusions: Military police officers involved in patrolling may require greater post‐work periods and strategies designed to reduce the weight of the protective apparatus to dissipate spinal loading. The external load used in patrolling is a relevant spinal loading factor.

Item Type: Article
Additional Information: ** Article version: VoR ** From Wiley via Jisc Publications Router ** Licence for VoR version of this article: http://creativecommons.org/licenses/by-nc-nd/4.0/ **Journal IDs: issn 1348-9585 **Article IDs: publisher-id: joh212297 **History: published 24-12-2021; accepted 06-11-2021; rev-recd 20-10-2021; submitted 25-08-2021; published 01-2021
Schools: Schools > No Research Centre
Journal or Publication Title: Journal of Occupational Health
Publisher: Wiley
ISSN: 1341-9145
Related URLs:
SWORD Depositor: Publications Router
Depositing User: Publications Router
Date Deposited: 06 Jan 2022 15:41
Last Modified: 15 Feb 2022 16:55
URI: http://usir.salford.ac.uk/id/eprint/62623

Actions (login required)

Edit record (repository staff only) Edit record (repository staff only)


Downloads per month over past year