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Can exercise prevent osteoporosis?

J Rittweger1

  • 1Institute for Biophysical and Clinical Research into Human Movement, MMU at Cheshire, Alsager, Cheshire, UK. jrittweger@mmu.ac.uk

Journal of Musculoskeletal & Neuronal Interactions
|July 20, 2006
PubMed
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Exercise may improve osteopenia by strengthening bones, but could worsen true osteoporosis by causing microdamage. This challenges the common understanding of bone health and exercise benefits.

Area of Science:

  • Bone physiology
  • Biomechanics
  • Exercise science

Background:

  • Osteoporosis definitions often focus on bone density, viewing osteopenia and osteoporosis as a continuum.
  • Harold Frost proposed osteopenia as a response to disuse, and osteoporosis as an inability to adapt to mechanical loads.

Purpose of the Study:

  • To explore the contrasting effects of exercise on osteopenia and true osteoporosis based on Frost's definition.
  • To investigate the potential risks of exercise-induced microdamage in true osteoporosis.

Main Methods:

  • Review of existing evidence on mechanical stimuli and bone strength.
  • Analysis of exercise's impact on bone loss and mass, particularly high-strain-rate exercises.
  • Theoretical consideration of exercise's role in microdamage accumulation.

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Main Results:

  • Mechanical stimuli, including certain exercises, can increase bone strength and potentially prevent bone loss.
  • Exercise may ameliorate osteopenia (response to disuse) by increasing bone mass.
  • Exercise might exacerbate true osteoporosis by accumulating microdamage, contrary to general belief.

Conclusions:

  • Exercise's effect on bone health is complex and depends on the specific condition (osteopenia vs. true osteoporosis).
  • High-strain-rate exercise may benefit osteopenic bone but pose risks for osteoporotic bone due to microdamage.
  • Further research is needed to differentiate exercise's impact on various bone conditions.