One theory was that sticking needles into certain points on the body stimulated the central nervous system to release natural pain-killing endorphins in the brain."VOA-T380", "2425155"
Walking induces the production of endorphins and norepinephrines in the brain, both of which contribute to the feeling of well-being and assist in stress reduction.〔【出典】Hiragana Times, 1995年8月号◆【出版社】株式会社ヤック企画 〕"HT106090", "2550887"