On one study, Michael Miller, a professor with the University of Maryland School of Medicine, measured the physiological responses of subjects who had laughed for 20 minutes while watching a comedy and discovered that their blood vessels had dilated by an average of 30 %.
美國馬里蘭大學醫學系教授米勒曾實際測量看完喜劇片後大笑 20 分鐘的受試者生理反應，發現受試者的血管平均擴張了 30 %。