Why sleeping on your back makes episodes more likely
Position changes airway sensation and body awareness. A simple switch to your side is one of the cheapest interventions.
Quick facts
Typical length20 seconds - 2 minutes
Ends by itselfAlways, without exception
Physical harmNone documented
People affectedAbout 8% at least once
In studies where people log their episodes, the supine position appears far more often than chance would predict.
Key idea
Two plausible reasons: the upper airway narrows slightly on your back, which the sleeping brain can interpret as pressure on the chest; and without side contact, body-position awareness is vaguer, which the dreaming mind fills in with a presence.
Practical fixes: a body pillow behind your back, a tennis ball sewn into pyjama backs, or simply falling asleep on your side deliberately for a few weeks until it becomes habit.
Supine sleeping correlates with more episodes.
Side sleeping is a low-cost experiment.
Give any change two to three weeks.
Sources & further reading
Links to peer-reviewed research and recognised medical organisations.