For most people who are suffering from insomnia, the sympathetic nervous system is overly active when the body is trying to fall asleep at night – making it hard to fall asleep or resulting in poor sleep. Ganban-yoku (Japanese thermal therapy) can help improve quality of sleep by tuning the nervous system. The deep, gentle warmth during the session, uniquely keeps the body in the active state while relaxing the mind. This equally engages both sympathetic nervous system and parasympathetic nervous system instead of one of the two overly being active for over one hour. Having the nervous system function at this sweet spot for a prolonged time helps to ease the symptoms of insomnia. Some users were able to achieve good quality sleep for up to five days post session. Mieko Morisawa, Pocca Poca Spa, PoccaPocaSpa.com