Positional therapy encourages side sleeping to reduce apneas that worsen when lying on the back

https://www.slideserve.com/nuallaqqkj/are-cpap-alternatives-safe-expert-insights-on-new-sleep-apnea-devices

Positional therapy encourages side sleeping to reduce apneas that worsen when lying on the back, using specialized pillows, belts, or vibrating sensors.