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Muscle weakness in osteoarthritis

S O'Reilly1, A Jones, M Doherty

  • 1Rheumatology Unit, Nottingham City Hospital, UK.

Current Opinion in Rheumatology
|May 1, 1997
PubMed
Summary

Muscle weakness is linked to knee osteoarthritis pain and disability, with emerging evidence suggesting a causal role beyond aging. Quadriceps exercises may improve strength, pain, and function, though long-term benefits require further study.

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Area of Science:

  • Orthopedics
  • Kinesiology
  • Gerontology

Background:

  • Joint structure and function rely heavily on muscle.
  • Muscle weakness is observed in knee osteoarthritis, exceeding effects of aging alone.
  • This weakness correlates with increased pain and disability.

Purpose of the Study:

  • To explore the relationship between muscle weakness and knee osteoarthritis.
  • To investigate the potential causative role of muscle weakness in osteoarthritis.
  • To review methods for assessing muscle strength and activation in osteoarthritis patients.

Main Methods:

  • Review of existing evidence on muscle weakness in osteoarthritis.
  • Discussion of voluntary strength measures and their limitations due to pain and psychological factors.
  • Mention of muscle activation assessment techniques for future exploration.

Main Results:

  • Preliminary evidence suggests muscle weakness may play a causative role in knee osteoarthritis.
  • Quadriceps exercises demonstrate potential to increase muscle strength and improve pain and function.
  • Current understanding of long-term exercise benefits for osteoarthritis therapy and prevention is limited.

Conclusions:

  • Muscle weakness is a significant factor in knee osteoarthritis, impacting pain and function.
  • Further research is needed to clarify the temporal relationship and causative role of muscle weakness.
  • Exercise, particularly quadriceps strengthening, shows promise for managing osteoarthritis, but long-term effects warrant investigation.

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