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Related Experiment Videos

Occupation as a risk factor for knee disorders

L K Jensen1, W Eenberg

  • 1Clinic of Occupational Medicine, Glostrup Hospital, Denmark.

Scandinavian Journal of Work, Environment & Health
|June 1, 1996
PubMed
Summary
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Exposure assessment of kneeling work activities among floor layers.

Applied ergonomics·2009

Kneeling or squatting work significantly increases the risk of knee osteoarthritis and bursitis. Heavy physical work also elevates the risk of knee osteoarthritis, but evidence for other knee disorders is limited.

Area of Science:

  • Occupational health
  • Orthopedics
  • Epidemiology

Background:

  • Knee disorders are a significant cause of morbidity.
  • Occupational factors like kneeling, squatting, and heavy physical work are suspected contributors to knee disorders.

Purpose of the Study:

  • To systematically review the existing literature on the association between occupational kneeling/squatting, heavy physical work, and the risk of knee disorders.

Main Methods:

  • A systematic literature review was conducted.
  • Included 19 controlled studies examining the correlation between specific work activities and knee disorders such as osteoarthritis, bursitis, meniscal lesions, and chondromalacia.

Main Results:

  • All studies found a significantly increased prevalence of knee osteoarthritis (1.4-4 times higher) in subjects performing kneeling or squatting work.

Related Experiment Videos

  • Four of eight studies showed a significantly increased prevalence of knee osteoarthritis (1.4-4.1 times higher) with heavy physical work.
  • All studies on bursitis indicated an increased prevalence among subjects with kneeling work.

    • Conclusions:

    • Kneeling or squatting work is strongly associated with an increased risk of knee osteoarthritis and bursitis.
    • Heavy physical work is also linked to a higher prevalence of knee osteoarthritis.
    • Occupational exposure as a cause for meniscal lesions and chondromalacia could not be sufficiently documented in the reviewed literature.