主题：健康
For many people, dieting can be an unpleasant experience. But the researchers found that for many of the subjects, caloric restriction was surprisingly not unbearable. While more people dropped out of the diet group than the control group, the study overall had a high retention rate. The researchers looked at measures of quality of life and discovered that the calorie-restricted group reported better sleep, increased energy and improved mood.
Compared to the control group, they did not have significant increases in hunger or food cravings either, Dr. Roberts said.
对许多人来说，节食可能是一种不愉快的经历。但研究人员发现，对许多受试者来说，令他们惊讶的是，热量限制不是无法忍受的。虽然退出节食组的人比对照组多，但总的来说，这项研究的受试者保留率很高。研究人员研究了生活质量的衡量标准，发现限制热量摄入的那组人睡眠更好、精力更充沛、情绪也更好。罗伯茨说，与对照组相比，他们的饥饿感和对食物的渴望也没有明显增加。
"There was nothing we measured that indicated that they weren't doing well,"she said.
“我们没有测量到任何表明他们情况不好的东西，”她说。
One question the study could not answer was whether caloric restriction could extend life span in humans the way that it can in other animals.The researchers would have to keep people on the diet and follow them for many decades to test that.
这项研究无法回答的一个问题是，热量限制是否能像延长其他动物寿命一样延长人类的寿命。要想测试这一点，研究人员只能让人们保持这样的饮食，并且继续跟踪他们几十年。
节选自《Cutting 300 Calories a Day Shows Health Benefits》
