Which body position is often associated with an increased risk of obstructive sleep apnea?

The supine position, or lying on the back, is often associated with an increased risk of obstructive sleep apnea due to the anatomical and physiological effects on the upper airway. In this position, gravity can cause the tongue and soft tissues in the throat to relax and fall backward, which can lead to partial or complete obstruction of the airway during sleep. This position is further compounded by any additional factors, such as excess body weight, which can exacerbate the collapse of the airway.

In contrast, the lateral position (lying on the side) typically provides a more open airway, reducing the risk of obstruction, as the tongue and soft palate are less likely to obstruct the airway. The prone position (lying on the stomach) generally leaves the airway less obstructed as well, while the sitting position presents minimal risk for airway obstruction because of the maintained upright posture. However, during sleep, the supine position is the one most prone to obstructive sleep apnea events, making it critical for patients to be aware of their sleeping posture to manage and mitigate risks associated with this sleep disorder.