Method: Observing parameters such as visceral index, survival time of low-temperature swimming for hydrocortisone-induced Yang-deficiency model mouse and testis-removed kidney-deficiency model rat.

• 方法：采用常规阳虚证和肾虚证动物模型，观察低温游泳存活时间、脏器系数、阴茎勃起潜伏期等指标。