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How did you train yourself to start sleeping on your back? I've been trying to stop side sleeping for a while due to some pains and postural concerns.

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You can put pillows on the side to make it harder for you to roll on your side or stomach while asleep. It can also help alleviate some tension in the arms if you put them on top of it.

Depending on the mattress, you might have to put a pillow under your knees. Sometimes I don't and my legs begin to feel uncomfortable, and sometimes I can sleep just fine without support for my legs.

Pillow under my knees and a thin one to hold on my chest and fold my arms on top of helped me get used to sleeping on my back.

But look out for signs of sleep apnea; I only get it sleeping on my back, which I rarely do. Possibly in some cases sleep apnea might be part of why it doesn't feel comfortable to sleep on your back. The other issue that is worse for me when I end up on my back is my mouth drying out (not good for teeth).

This is quite common for people with obstructive sleep apnea (same here). More comfy for me, but i'm supposed to sleep sideways.

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