For sleep apnea, one effective behavioral intervention is to shift to nasal breathing during sleep. You can tape your mouth shut using medical tape before going to bed, which encourages nasal breathing and can greatly offset sleep apnea and snoring. Additionally, practicing nasal breathing during low-intensity cardiovascular exercise can help train your body to breathe through your nose during sleep. Remember, sleep apnea is a serious health concern, and it's important to consult a healthcare professional for personalized advice.
This is not medical advice. Consult your physician before changing protocols.