Obesity and adverse breast cancer risk and outcome: Mechanistic insights and strategies for intervention.

177 Two case‐control studies also associated higher recreational PA versus none with a 30% to 60% lower breast cancer risk (most of borderline significance), with a significant decrease in premenopausal, receptor‐negative cancers (HR, 0.46; 95% CI, 0.24‐0.92). 26 Breast Cancer Mortality Is Inversely Associated With PA Before and After Breast Cancer Diagnosis Many large, observational, prospective cohort studies have associated PA before and after a diagnosis of invasive breast cancer with better outcome.

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