For most of us, the hours we spend sleeping are simply a time for rest and recovery. However, you might be surprised to learn that your sleeping position can have a significant impact on your body, particularly if you already have an injury. When you consider that we spend approximately 40% of our lives in bed, it becomes less surprising. Ideally, your body should be held in a position of minimal stress while sleeping. This means that all your joints and muscles are resting in a neutral position. Over time, joints that are held in more extreme positions may put pressure on the surrounding structures and this may lead to a feeling of stiffness in the morning.