Scientific References

Source: Schwab RJ et al., Am J Respir Crit Care Med, 2003 - Demonstrated that airway collapsibility is less in lateral (side) positions. MRI and CT studies show the pharyngeal airway is significantly wider in the side-sleeping positing compared to supine (on the back)

Source: Carwright RD, Sleep, 1984 - Early foundational work showing that many snorers benefit from positional therapy. Acoustic analysis studies have measured snoring intensity and frequency in different sleep positions. Lying on the back correlates with louder and more frequent snoring, while side sleeping reduces both.

How do I quiet my snoring? - Mayo Clinic News Network

Sleep on your side. Lying on your back allows your tongue to fall backward into your throat, narrowing your airway and partially obstructing airflow. Try sleeping on your side.

Choosing the Best Sleep Position | Johns Hopkins Medicine

Positioning yourself on your side or stomach can help the airways stay open to reduce snoring

Do products that claim to stop snoring actually work? - Harvard Health

Positional aids

Research shows that sleeping on your side (rather than on your back) can significantly reduce both the intensity and duration of snoring in many individuals without sleep apnea. For some people, positional aids that encourage side sleeping are a practical and low-cost way to reduce snoring.