Chiel H J, Wurtman R J
Science. 1981 Aug 7;213(4508):676-8. doi: 10.1126/science.7256271.
The nocturnal activity patterns of rats changed significantly within 3 days after they were given unrestricted access to isocaloric diets in which the ratio of carbohydrate to protein was systematically varied. As the ratio increased, the rats were more continuously active. The subjects showed similar responses to variations in this ratio whether the diet contained 15 or 45 percent fat. No correlation was found between the number of calories an animal ate and its activity pattern.
在给予大鼠无限制获取热量相等但碳水化合物与蛋白质比例系统变化的饮食后3天内，大鼠的夜间活动模式发生了显著变化。随着该比例增加，大鼠的活动愈发持续。无论饮食中脂肪含量为15%还是45%，实验对象对这一比例变化均表现出相似的反应。未发现动物摄入的卡路里数量与其活动模式之间存在关联。
