A study published in the journal Sleep found that a medium-firm sleep surface can provide the perfect balance for optimal spine alignment, pressure relief, and overall sleep quality. The researchers discovered that a medium-firm mattress allowed for the right amount of support and cushioning, leading to improved sleep quality and reduced back pain. In fact, 71% of participants in the study reported improved sleep quality after switching to a medium-firm mattress. By providing the right amount of support and pressure relief, a medium-firm sleep surface can help reduce tossing and turning, allowing you to get a deeper and more restful sleep.