A. Yes. The mattress has the potential either to encourage sleep or rob you of sleep. Whether your mattress is a sleep friend or a sleep foe can determine how refreshed you feel in the morning. If you’re tossing and turning more at night or if you’re waking up feeling stiff or sore after a night’s sleep, it could be a sign that your current mattress is no longer the best for you. Your body appreciates a comfortable, supportive mattress and will let you know if it’s not up to the task.