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Osteoporosis, calcium and physical activity.

A D Martin, C S Houston

    CMAJ : Canadian Medical Association Journal = Journal De L'Association Medicale Canadienne
    |March 15, 1987
    PubMed
    Summary

    Calcium supplements do not appear to prevent bone loss. Regular weight-bearing exercise, especially when started early, is key to building bone density and preventing fractures and osteoporosis.

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    Area of Science:

    • Bone health and osteoporosis research
    • Exercise physiology and bone density
    • Nutritional science and skeletal health

    Background:

    • Osteoporosis is a significant health concern, particularly for middle-aged women, leading to increased calcium supplement sales.
    • Epidemiologic studies have not consistently linked higher calcium intake to improved bone density or reduced fracture risk.
    • The effectiveness of calcium supplementation in preventing bone loss is debated.

    Purpose of the Study:

    • To evaluate the evidence from controlled trials on calcium supplementation and physical activity for bone loss.
    • To determine the impact of weight-bearing activity on bone mass and fracture prevention.
    • To assess the therapeutic potential of physical activity for individuals with osteoporosis.

    Main Methods:

    • Review of controlled trials examining calcium supplementation and physical activity interventions.
    • Analysis of data on bone density changes in relation to exercise and calcium intake.
    • Assessment of fracture incidence in studies involving bone health interventions.

    Main Results:

    • Weight-bearing activity, particularly when initiated early and performed regularly, increases peak bone mass.
    • Consistent physical activity can delay the onset of bone loss and slow its progression.
    • Physical activity programs demonstrate potential for managing osteoporosis and reducing fracture risk.

    Conclusions:

    • Calcium supplementation alone may not be sufficient for preventing osteoporosis or fractures.
    • Weight-bearing exercise is a crucial factor in achieving optimal bone health throughout life.
    • Structured physical activity offers a safe and effective treatment strategy for osteoporosis.

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