Side sleeping and back sleeping are generally considered to be the best sleeping positions. This is mainly due to their ability to promote proper (or neutral) spinal alignment and protect the joints.

Best position: If you’re ready to settle in for the night (or grab a much-needed nap), make sure that you sleep on your back with your head and shoulders elevated at a 45-degree angle.

but your go-to sleeping position can affect how restful your night is — and how your body feels the next day. So which ...