An incorrect sleeping position is rarely the direct cause of back injury. Yet it is often one of the underlying causes. If the outer band of an intervertebral disc has hardened due to too much friction, it will no longer bend but burst when subjected to incorrect movement or too much strain. Your sleep hygiene is thus – much more often than you might think – the indirect cause of numerous back problems. Rather than relieve pain, we want to prevent back problems with the YUNO mattress.