If the patient says that he has had headaches since childhood, and underwent a computed tomography (CT) exam that turned out negative, then there's an 80 % chance that anxiety or hormonal imbalance are causing the headaches.
他指出，運動時會分泌「內生性嗎啡」，令人產生愉悅感，像走路就是一種抒壓的方法，輕快地走路 40 分鐘，平均可以降低 14％的焦慮程度。