A Health Professionals Follow-up Study by the department of epidemiology and nutrition at Harvard reported that obesity and smoking are strongly associated with a greater risk of erectile dysfunction. The participants in the study reported very good erectile functions, and no chronic diseases before 1986. The researchers made adjustments to the results to account for reported prostate cancer treatments, which lead to erectile dysfunction.
The researchers found the obesity and smoking were associated with the development of ED. The findings strongly suggest that regular physical activity plays an important roll in averting erectile dysfunction. The study also showed an association of erectile dysfunction with coronary heart disease.