An extra hour of deep sleep each night*
In an independent sleep study conducted by the Karolinska Institute of Sweden, the sleep patterns of individuals using a variety of innerspring mattresses were measured using an EEG to record the electrical activity in the cerebral cortex of the brain. The study demonstrated that DUX users not only reached the Deep Sleep stage of sleep faster, but remained there approximately an hour longer. This is especially beneficial since it is during Deep Sleep that the body and immune system recovers and repairs itself.
* BRL, 1985, 1989 (Bed Research Laboratory, Associate Professor Evert Knutsson, Associate Professor Sven Engdahl)