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Related Experiment Videos

Load on back in concrete reinforcement work.

J Saari, G Wickström

    Scandinavian Journal of Work, Environment & Health
    |January 1, 1978
    PubMed
    Summary

    Concrete reinforcement workers experience significant back strain from common bent-double and forward-leaning postures. These work positions, coupled with lifting heavy materials, may contribute to lumbar disc degeneration and reversible low-back symptoms.

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    Area of Science:

    • Occupational Health
    • Ergonomics
    • Biomechanics

    Background:

    • Concrete reinforcement work involves physically demanding tasks.
    • Repetitive and static postures can lead to musculoskeletal disorders.

    Purpose of the Study:

    • To determine the work-related demands on the backs of concrete reinforcement workers.
    • To identify specific postures and loads contributing to back pain.

    Main Methods:

    • Analysis of 4,327 work observations.
    • Assessment of work postures and weights lifted.
    • Evaluation of static and dynamic loads.

    Main Results:

    • Forward-leaning postures were common, exceeding a third of work time in rod preparation.
    • A bent-double posture was required for 58% of time in a key assembly task.
    • Heavy weights (over 30 kg) were lifted frequently, and high forces were occasionally needed.

    Conclusions:

    • The bent-double posture, especially with added strain, is a likely cause of accelerated lumbar disc degeneration.
    • Forward-leaning postures may lead to reversible low-back symptoms in workers.

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