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Updated: Jun 13, 2026
05:59
Visualization of Intensity Levels to Reduce the Gap Between Self-Reported and Directly Measured Physical Activity
Published on: March 7, 2019
Physical activity and reduced breast cancer risk: a multinational study
Luke D Ratnasinghe1, Ramakrishna V Modali, Michael B Seddon
1Cytonix, Beltsville, Maryland 20705, USA. LukeRatnasinghe@Cytonix.com
Nutrition and Cancer
|May 1, 2010
Summary
Engaging in regular physical activity significantly lowers breast cancer risk by 50%. This benefit is observed across diverse ethnic groups and is independent of factors like race or weight.
Area of Science:
- Oncology
- Epidemiology
- Public Health
Background:
- Breast cancer is a leading cause of mortality in women globally.
- Identifying modifiable risk factors is crucial for effective prevention strategies.
Purpose of the Study:
- To investigate the association between physical activity and breast cancer risk.
- To determine if physical activity reduces breast cancer risk across different ethnic groups.
Main Methods:
- Multinational study involving 1,463 breast cancer cases and 4,862 controls.
- Data collected via questionnaires on exercise frequency, duration, and intensity.
- Multivariate logistic regression analysis used to assess risk associations.
Main Results:
- Physical activity once per week or more was associated with a 50% lower odds of breast cancer.
- No additional risk reduction was observed for activity 3 times/week or more.
- Activity exceeding 30 minutes per week showed a 35% or greater risk reduction across all ethnic groups.
Conclusions:
- Physical activity is a significant protective factor against breast cancer.
- The breast cancer risk reduction associated with physical activity is consistent across various ethnicities, body mass index categories, and family histories.
- Promoting regular physical activity may be a key public health strategy for breast cancer prevention.
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