• Ergonomics · Aug 2017

    Comparative Study

    The effect of training on lumbar spine posture and intervertebral disc degeneration in active-duty Marines.

    • Ana E Rodriguez-Soto, David B Berry, Rebecca Jaworski, Andrew Jensen, Christine B Chung, Brenda Niederberger, Aziza Qadir, Karen R Kelly, and Samuel R Ward.
    • a Department of Bioengineering , University of California , San Diego , CA , USA.
    • Ergonomics. 2017 Aug 1; 60 (8): 1055-1063.

    AbstractMilitary training aims to improve load carriage performance and reduce risk of injuries. Data describing the lumbar spine (LS) postural response to load carriage throughout training are limited. We hypothesised that training would reduce the LS postural response to load. The LS posture of 27 Marines was measured from upright MR images: with and without load (22.6 kg) at the beginning, middle, and end of School of Infantry (SOI) training. Disc degeneration was graded at L5-S1. No changes in posture and disc degeneration were found throughout training. During load carriage the LS became less lordotic and the sacrum more horizontal. Marines with disc degeneration had larger sacral postural perturbations in response to load. Our findings suggest that the postural response to load is defined more by the task needs than by the physical condition of the Marine. Practitioner Summary: The effect of military training on lumbar spine posture is unknown. The lumbar posture of 27 Marines was measured from upright MR images, with and without load throughout infantry training. No changes in posture or IVD degeneration were found across training. Marines with degeneration at the L5-S1 level had larger sacral postural perturbations in response to load.

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