选择哪顿饭多吃并不影响减肥

Many people eat the most of their calories at night, limiting breakfast due to busy workdays and school mornings, and experts have long thought eating late added to weight gain or hindered weight loss. You should eat light at night and make breakfast your biggest meal, earlier research has shown, to give your body time to burn off calories throughout the day.

The most common argument is that eating more calories earlier “shifts metabolism(新陈代谢)” in ways that favor greater weight loss, said Dr. David Katz, founder and former director of Yale University’s Yale-Griffin Prevention Research Center, via email.

Yet eating a big breakfast instead of a larger meal later in the day did not impact weight loss, according to a new clinical trial that compared people eating most of their daily calories at breakfast with those eating the most at dinner.

“With calories either morning-loaded or evening-loaded, the researchers found nearly identical weight loss,” said Katz, who was not involved in the study. In addition, “any magical effects” of early eating on the body’s metabolism were debunked(驳斥), he said, describing the research as “extremely thorough and strict.” “Thus, this study debunks the belief that eating early alters metabolism in a way that favors greater weight loss.” said Katz.

The study, published Friday in the journal Cell Metabolism, was a randomized “crossover” trial. Thirty overweight or obese yet otherwise healthy people spent four weeks eating 45% of their assigned calories in the morning meal, 35% at lunch and 20% at dinner. The same group then switched to four weeks when the evening meal was highest in calories: 20% in the morning, 35% at lunch and 45% for dinner. “Participants were provided with all their meals for eight weeks,” study co-author Alexandra Johnstone, a professor of medicine at the Rowett Institute at the University of Aberdeen in Scotland, said in a statement, “and their energy consumption and body composition were monitored for changes.”

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1.What did earlier research suggest people doing?

A Eating most calories at night.

B Limiting their breakfast.

C Eating most for breakfast.

D Eating nothing for breakfast.

解析：选C。C细节理解题。根据第一段第二句的“You should eat light at night and make breakfast your biggest meal, earlier research has shown”可知，以前的研究建议晚上少吃早上吃多吃。故选C。

2.What can be learned from the new trial?

A Having a big breakfast results in greater weight loss.

B Eating a big meal in the evening favors greater weight loss.

C The time of eating a big meal has little influence on weight loss.

D It confirms the “magical effect” of early eating on metabolism.

解析：选C。C细节理解题。根据第三段的“Yet eating a big breakfast instead of a larger meal later in the day did not impact weight loss, according to a new clinical trial”可知，无论是早餐多吃还是晚餐多吃，对于减肥几乎都没有影响。故选C。

3.What is Katz’s attitude to the result of the research?

A Doubtful.

B Disapproving.

C Ambiguous.

D Favorable.

解析：选D。D推理判断题。根据第四段最后两句的“describing the research as ‘extremely thorough and strict’”以及““Thus, this study debunks the belief that eating early alters metabolism in a way that favors greater weight loss.””可知，Katz认为这次研究极其全面和严格，因此推断他对于研究结果是赞同的。故选D。

4.What is the last paragraph mainly about?

A The details of the research.

B The background of the research.

C The result of the research.

D The reaction to the research.

解析：选A。A段落大意题。文章最后一段主要描述，同一组30人前四周在早餐、午餐和晚餐分别摄入了分配热量的45%、35%和20%；而后四周晚餐的热量最高:早上20%，午餐35%，晚餐45%。研究人员对他们这八周的能量消耗和身体成分变化进行了监测。这些都是该研究的具体过程细节，故选A。