Waking up stiff, sore, or achy is often a sign that your mattress and sleep position aren’t working with your body—but the right setup can make a real difference. In this section, you’ll learn how mattress firmness, support, and materials interact with the way you sleep—on your back, side, or stomach—to affect pressure relief, spinal alignment, and overall comfort. Whether you’re managing back pain, shoulder or hip pressure, or just trying to prevent future discomfort, these resources will help you understand what to look for in a mattress and how to optimize your sleep position so you can wake up feeling more rested and less sore.