An Analysis of Night Sleep after CO 2 Water Bathing in Athletes

Background: It is clear that activities of daily living (ADL) have good human locomotion, food intake, adequate brain activities, etc. To have a good ADL, it is thought that human body needs to no fatigue and sufficient body recovery. One of the body recoveries has the night sleep. Even though sound sleep has many factors (i.e. bed, pillow, room temperature, time of onset of sleep and circadian rhythm, etc.), human sleep has not been explained yet. In Japan, there are water immersion bathing of age-old customs. The bathing has not only washing body but also warm body and improve the blood flow. However, the relationship CO2 water bathing and night sleep has not clarified. The purpose of this study is to examine the effect of CO2 water bathing on responses to the night sleep.