3. The spine elongates and realigns
Some doctors will tell you that you actually grow while you slumber, but really it’s your spine that lengthens. You see, as you sleep the discs in your spine elongate or decompress due to lack of gravity and pressure that occurs as you stand during the day and walk around. That’s why sleeping in a position that doesn’t compress the spine (like on your side in the fetal position) is the best for your back health.