Impact of Redistributing Torso-Borne Loads on Soldier Biomechanics, Physiology, Cognitive Performance and Comfort
Abstract
This effort focused on understanding the impact of redistributing torso-borne loads from the shoulders to the pelvic region on Soldier biomechanics, physiology, cognitive performance, and comfort. The goal was to determine whether an optimal load re-distribution between the shoulders and the pelvis exists. Soldiers serving as study participants were outfitted in a military fighting load as they executed neck flexion-extension movements and engaged in 10-min and 2-h trials of treadmill walking under conditions that differed with regard to the proportion of the load imposed on the shoulder region. Pressure measurements at the skin surface were captured at the shoulders and hips to quantify the load conditions. To achieve the load redistribution, a commercially available weight distribution device was used. Pressures measured at the top of the shoulders were used to establish four offloading levels: high (70-90 percent), medium (40-60 percent), low (10-30 percent), and no offloading relative to shoulder pressure when the fighting load was worn without the weight distribution device. Load redistribution had minimal impact on Soldier performance. While no specific offloading condition performed better or worse than any other, load redistribution from the shoulders to the pelvis did have an impact on bicep femoris muscle activity and comfort measures at the shoulders and hips.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 2023
- Accession Number
- AD1199856
Entities
People
- Carolyn Bensel
- Clifford Hancock
- Jessica Batty
- John Ramsay
- Karen Gregorczyk
- Marianna Eddy
- Marina Carboni
- Meghan P. O’Donovan