Ideally, the best position for sleeping is on your back. This evenly distributes the weight so that there are no pressure points on your back or neck. The next best sleeping position is on your side, and then last on the list is your stomach. However, if sleeping on your stomach feels natural, and you wake up happy, then it’s probably ok for you. It’s also important to remember that just because you fall asleep in one position doesn’t mean that you will sleep like that all night long. Most people toss around while they’re asleep as their body naturally finds newer, more comfortable positions.
The biggest takeaway is that if you continuously wake up with back pain, headaches, or sore muscles, then you should make a sleep change. That may include trying new positions, or it may include investing in a proper pillow.