"Forest bathing," a term proposed by the Forestry Agency in 1982, can be described the psychological and physical restoration of health by experiencing nature and the ecosystem in the forest using the five senses. Forest bathing is expected to be a place free of everyday stress, where the bather can relax, and is a way to cope with modern stresses. Recent studies have shown the stress reduction effect of forest bathing. Forest bathing has been shown to physically reduce not only sympathetic nerve activity, but also stress hormones such as cortisol in saliva, blood pressure, and pulse, and to elevate parasympathetic nerve activity even during a short forest bathing (20 min). It has also become clear that forest bathing psychologically contributes a positive affect, subjective restoration, and enhanced mood. Internal immunocompetence, such as increased activity of natural killer cells, which is an internal immune cell, is increased by a long (three days and two nights) forest bathing. Forest Therapy Bases or Roads, where visitors can enjoy effective and restorative forest bathing, have been constructed throughout the country (so far, in 57 locations through the end of the 2014 fiscal year). At these sites, a forest bathing course and menu, reflecting the characteristics of each site, are prepared. A guide who has qualifications, such as forest therapist, takes visitors walking, allowing them to experience not only the quality of the forest bathing, but also a high stress reduction effect from the forest atmosphere. Finally, because the visitor can evaluate his or her mental and physical state before and after the forest bathing at these sites, the sites can be thought of as an example of the application of biofeedback for the purpose of health management.
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