Sleep apnea is prevalent among obese people. Fatty cells in the throat tissue narrow and block the airway. A large neck is associated with sleep apnea, whether or not the person is obese. Obesity, particularly abdominal and upper body obesity, is considered to be the most significant risk factor for obstructive sleep apnea. Research shows that more than half of the people with sleep apnea are obese.
Weight loss can lead to a significant reduction in symptoms of obstructive sleep apnea. Even modest weight loss can help get the condition under control.