Effect of cold blast stimulation through bedding on the quality of sleep

Human sleep is thought to consist of some stages. It depends on the sleep stage whether awaking is pleasant or not. The sleep state changes cyclically and the change can be checked by measuring the depth of sleep. It is believed that the depth of sleep affects the mood upon awakening and the quality of sleep. The purpose of this research is to control the sleep cycle by giving a cold blast stimulation in order to improve the quality of sleep. We thought that rapid temperature changes in the bed affected the sleep cycle materially, so we gave cold blast stimulations during deep sleep to control the sleep cycle. As a result, we succeeded in dephasing the sleep cycle.