長文読解（人文系・自然科学系の文章）- 問題46

The concept of "forest bathing," known as shinrin-yoku in Japanese, has gained significant attention in recent years as a therapeutic practice. Originally developed in Japan in the 1980s, this practice involves immersing oneself mindfully in a forest environment to promote physical and mental well-being.
Scientific research has revealed compelling evidence supporting the benefits of forest bathing. Studies conducted by Dr. Qing Li at Nippon Medical School found that spending time in forests can boost the immune system by increasing the production of natural killer cells, which help fight infections and cancer. Additionally, forest environments release organic compounds called phytoncides, which trees produce to protect themselves from harmful insects and bacteria.
The practice has shown remarkable effects on stress reduction. Participants in forest bathing sessions experienced a 50% decrease in cortisol levels, the hormone associated with stress. Furthermore, blood pressure readings dropped significantly, and participants reported improved mood and enhanced creativity after just two hours of forest exposure.
As urbanization continues to separate people from natural environments, forest bathing offers a simple yet powerful remedy for modern life's challenges. Many countries, including South Korea and Germany, have now incorporated forest therapy programs into their public health initiatives, recognizing the profound connection between human health and nature.