Lifetime recreational physical activity and the risk of prostate cancer
Research on the association between physical activity and the risk of prostate cancer is inconsistent. The aim of this study was to investigate whether the timing, intensity, and type of recreational physical activity influence prostate cancer risk.
A population-based case–control study was conducted in Western Australia in 2001–2002. Data were collected on lifetime recreational physical activity from a self-reported questionnaire. The estimated effects of recreational physical activity on prostate cancer risk were analyzed using logistic regression, adjusting for demographic and lifestyle factors. This analysis included 569 incident cases and 443 controls.
There was a significant, inverse dose–response relationship between vigorous-intensity recreational physical activity between the ages 19 and 34 years and the risk of prostate cancer (pTrend = 0.013). Participants in the most active quartile of vigorous-intensity physical activity in this age period had a 33% lower risk of prostate cancer than participants in the least active quartile (Adjusted Odds Ratio = 0.67, 95% confidence interval = 0.45–1.01). Moderate-intensity recreational physical activity was not associated with the risk of prostate cancer. Recreational physical activity performed over the lifetime showed no association with prostate cancer risk. Weight training performed from early adulthood onwards showed a non-significant but consistent inverse association with prostate cancer risk. There was no strong evidence that physical activity was differentially associated with the risks of low-grade and medium-to-high grade prostate cancers.
A high level of vigorous recreational physical activity in early adulthood may be required to reduce the risk of prostate cancer.
KeywordsProstate cancer Physical activity Epidemiology Resistance training
The Prostate Health Study was funded by a Western Australian Health Promotion Foundation (Healthway) Research Project Grant and the BUPA Foundation. Lin Fritschi and Terry Boyle were supported by the Australian National Health and Medical Research Council (Fellowship #37614900 to LF; Early Career Fellowship #1072266 to TB). The authors acknowledge Professor Anna Timperio’s contribution to the Prostate Health Study.
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
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