Rowland N
Physiol Behav. 1984 Aug;33(2):253-6. doi: 10.1016/0031-9384(84)90107-0.
Mesocricetus auratus with established wheel running in a thermoneutral environment (23 degrees C) showed an immediate suppression of running when placed in a cold room at 4 degrees C. This suppression was seen in three separate studies and lasted at least 1 month. Food intake of these hamsters rose within 48 hr in the cold, and body weight was maintained. In contrast, hamsters which had been sedentary in the 23 degrees C room showed a slower rise in food intake in the cold and sustained a chronic drop in body weight. In vivo fatty acid synthesis rates were greatly elevated in white and brown adipose tissue, but not liver, of exercise versus sedentary hamsters after 1 month in the cold, despite the relative inactivity of both groups throughout the cold exposure. Previous exercise training predisposes hamsters to efficient energy storage in the cold. The energy demand of the cold environment may be responsible for the decreased voluntary running.
在热中性环境（23摄氏度）中已养成跑步习惯的金黄仓鼠，当被置于4摄氏度的冷房间时，跑步行为立即受到抑制。这种抑制在三项独立研究中均有观察到，且持续至少1个月。这些仓鼠的食物摄入量在寒冷环境中48小时内增加，体重得以维持。相比之下，在23摄氏度房间中 sedentary 的仓鼠在寒冷环境中食物摄入量上升较慢，体重持续慢性下降。在寒冷环境中1个月后，与 sedentary 仓鼠相比，运动仓鼠的白色和棕色脂肪组织而非肝脏中的体内脂肪酸合成速率大幅升高，尽管两组在整个寒冷暴露期间相对不活动。先前的运动训练使仓鼠在寒冷环境中能够高效储存能量。寒冷环境的能量需求可能是导致自发跑步减少的原因。
