One in five men experience erectile dysfunction, or the inability to perform sexually to their satisfaction, and the problem becomes more common as men become older. The good news is that simple lifestyle changes may be all that is needed to avoid the problem. This is because erectile dysfunction is now known to be significantly more prevalent in men with diabetes and other heart disease risk factors than in those who are physically sedentary. A healthy lifestyle, including regular exercise and a nutritious diet, can greatly improve erectile dysfunction and lessen its associated risks.