Impotence has many causes and weight gain contributes to several of them. Psychologically, the negative body image associated with weight gain can decrease desire and increase anxiety about intercourse. Every 35 pounds of excess weight around the belly shortens the external length of the penis by about 1 inch. Over time, both conditions damage the circulatory system and may diminish the blood supply to the penis during an erection. Obesity can also decrease testosterone levels.
Low testosterone decreases sexual desire, increases fatigue, and prevents erections.
Weight control with a carefully planned diet and exercise program has many benefits for sexual health, as well as overall health. Always consult your own doctor about any opinions or recommendations with respect to your symptoms or medical condition. Beth Israel Deaconess Medical Center .