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Influence of carrying heavy loads on soldiers' posture, movements and gait
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Attwells, Renee L., Birrell, Stewart A., Hooper, Robin H. and Mansfield, Neil J. (2006) Influence of carrying heavy loads on soldiers' posture, movements and gait. Ergonomics, Vol.49 (No.14). pp. 1527-1537. doi:10.1080/00140130600757237
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Official URL: http://dx.doi.org/10.1080/00140130600757237
Abstract
Military personnel are required to carry heavy loads whilst marching; this load carriage represents a substantial component of training and combat. Studies in the literature mainly concentrate on physiological effects, with few biomechanical studies of military load carriage systems (LCS). This study examines changes in gait and posture caused by increasing load carriage in military LCS. The four conditions used during this study were control (including rifle, boots and helmet carriage, totalling 8 kg), webbing (weighing 8 kg), backpack (24 kg) and a light antitank weapon (LAW; 10 kg), resulting in an incremental increase in load carried from 8, 16, 40 to 50 kg. A total of 20 male soldiers were evaluated in the sagittal plane using a 3-D motion analysis system. Measurements of ankle, knee, femur, trunk and craniovertebral angles and spatiotemporal parameters were made during self-paced walking. Results showed spatiotemporal changes were unrelated to angular changes, perhaps a consequence of military training. Knee and femur ranges of motion (control, 21.1° ± 3.0 and 33.9° ± 7.1 respectively) increased (p < 0.05) with load (LAW, 25.5° ± 2.3 and 37.8° ± 1.5 respectively). The trunk flexed significantly further forward, confirming results from previous studies. In addition, the craniovertebral angle decreased (p < 0.001) indicating a more forward position of the head with load. It is concluded that the head functions in concert with the trunk to counterbalance load. The higher muscular tensions necessary to sustain these changes have been associated with injury, muscle strain and joint problems.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Divisions: | Faculty of Science > WMG (Formerly the Warwick Manufacturing Group) | ||||
| Journal or Publication Title: | Ergonomics | ||||
| Publisher: | Taylor & Francis Ltd. | ||||
| ISSN: | 0014-0139 | ||||
| Official Date: | 2006 | ||||
| Dates: |
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| Volume: | Vol.49 | ||||
| Number: | No.14 | ||||
| Page Range: | pp. 1527-1537 | ||||
| DOI: | 10.1080/00140130600757237 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access |
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