According to sleep experts, this is the most common sleep position: 57% of us will start a night of sleep on our side. Side-sleeping can be ideal for those with acid reflux and stomach disorders if they sleep on their left side, and it may be good for those with back pain. Those who snore could also get more restful sleep in this position. Pregnant women should sleep on their left side to improve blood flow to the uterus. That said, sometimes the quality of sleep associated with this position is low. Sleeping on your side can put pressure on your hips and shoulders. If you’re a side-sleeper, you’ll want to use a thicker pillow to reduce neck strain, and you may want to put a smaller pillow between your legs to stabilize the hips.