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Physical activity and cancer.

R J Shephard1

  • 1School of Physical and Health Education, Faculty of Medicine, University of Toronto.

International Journal of Sports Medicine
|December 1, 1990
PubMed
Summary
This summary is machine-generated.

Physical activity may reduce cancer risk, particularly colon cancer, though evidence is not conclusive. Moderate exercise also aids cancer treatment and overall well-being.

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Area of Science:

  • Oncology
  • Epidemiology
  • Public Health

Background:

  • Physical activity's role in cancer prevention is under investigation.
  • Diverse cancer types and activity histories complicate direct correlations.
  • Existing research suggests potential protective effects against certain neoplasms.

Purpose of the Study:

  • To examine the relationship between physical activity and cancer risk.
  • To evaluate evidence from occupational, leisure, and sports activities.
  • To assess the potential mechanisms and limitations of this association.

Main Methods:

  • Review of major occupational studies on physical activity and cancer.
  • Application of Bradford Hill's criteria to assess causality.
  • Analysis of laboratory data on leisure activity and cancer prevalence.

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Main Results:

  • Five of seven occupational studies indicated physical activity protects against colon cancer.
  • Physical inactivity appears causally linked to increased intestinal neoplasia risk.
  • Active leisure in women correlated with reduced breast and reproductive system cancers.

Conclusions:

  • Evidence suggests physical activity may offer protection against specific cancers like colon cancer.
  • Further well-designed epidemiological studies are needed to confirm these findings.
  • Physical activity may also support cancer treatment and patient well-being.