Obstructive sleep apnea occurs more frequently in obese people. According to the Centers for Disease Control and Prevention, about 65% of Americans are overweight or obese. Not only do we gain weight around our waists but around our necks as well. The increased fat in the neck is thought to put pressure on the airway contributing to blockage of airflow. It has been found that neck size is one risk factor of sleep apnea. For men, a neck size of more than 17 inches and women more than 16 inches places them at an increased risk.