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Related Experiment Videos

Differences in low back load between kneeling and seated working at ground level

J H van Dieën1, S M Jansen, A F Housheer

  • 1Institute of Agricultural and Environmental Engineering (IMAG-DLO), Wageningen, The Netherlands.

Applied Ergonomics
|January 1, 1998
PubMed
Summary

Working on a specialized chair reduced low back load and fatigue compared to kneeling during radish harvesting. However, the chair is a sub-optimal ergonomic solution as discomfort still increased significantly.

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Area of Science:

  • Ergonomics
  • Occupational Health
  • Biomechanics

Background:

  • Radish harvesting often involves prolonged kneeling, leading to significant low back load and discomfort.
  • Conventional working postures can cause substantial musculoskeletal strain.
  • Ergonomic interventions are needed to mitigate risks associated with agricultural tasks.

Purpose of the Study:

  • To compare the biomechanical load on the low back during radish harvesting in a kneeling posture versus using an ergonomic chair.
  • To evaluate back muscle fatigue, spinal length changes, and perceived discomfort in different working postures.

Main Methods:

  • Ten male subjects participated in the study.
  • Measurements included back muscle fatigue, spinal length changes, and subjective discomfort ratings.

Related Experiment Videos

  • Data were collected while subjects harvested radish in a kneeling position and while using a specially designed chair.

    • Main Results:

    • Working on the chair significantly reduced back load and muscle fatigue compared to kneeling.
    • Spinal length changes were also lower when using the chair.
    • Despite reductions, back discomfort substantially increased over time even when using the chair.

    Conclusions:

    • The ergonomic chair offers some benefits by reducing direct load and fatigue compared to kneeling.
    • However, it remains a sub-optimal solution due to persistent increases in discomfort.
    • Allowing for variation in working methods, including the use of this chair, may be a practical interim recommendation.