A study that was done with 2700 men diagnosed with prostate cancer ( nonmetastatic ) were observed from 1990 to 2008. Proportional hazards models were used to evaluate physical activity and time to overall and prostate cancer-specific death. The researchers found that the men who walked ≥ 90 minutes per week at a normal to very brisk pace had a 46% lower risk of all-cause mortality (hazard ratio [HR] 0.54; 95% CI, 0.41 to 0.71) compared with shorter durations at an easy walking pace. Men with ≥ 3 hours per week of vigorous activity had a 61% lower risk of PCa death (HR, 0.39, 95% CI, 0.18 to 0.84; P = .03) compared with men with less than 1 hour per week of vigorous activity.