题型:阅读理解 题类:常考题 难易度:普通
浙江省东阳中学2018-2019学年高二上学期英语期中考试试卷
People who increased the number of times they chewed their food before swallowing ate less each meal, according to a new study.
Slow eaters tend to be slimmer. Before the study, the researchers didn't know whether asking people to chew more would change the amount of food they ate. But they found meal sizes became smaller when adults chewed more before swallowing——whether they were slim, normal-weight, overweight or obese.
“The study proves the benefits of taking time to chew food well,” said dietitian Brown Giggs.
The participants were asked to eat five pizza rolls and count the number of times they chewed each roll. Researchers did not tell them what exactly was being tested in the study. 47 people went on to finish the study. 10 were slim, 10 were normal-weight, 27 were overweight. Those participants attended three weekly lunchtime test periods. Each day, researchers gave them 60 pizza rolls and told them to eat until they were full. Depending on the period, researchers asked people to chew every bite the same number of times as at their test visit, 50% more or twice as many times.
Slim participants ate more slowly than normal-weight and overweight participants. Overall, people spent more time eating when they increased the number of times they chewed. The participants rated their appetite (食欲) the same after each meal even though slower chewing reduced how much they ate.
Researchers noted that the study was conducted under lab conditions, so it's not clear whether it would adapt to normal life. The researchers are now looking to see whether how fast people eat, for example, influences how much they eat. “It takes about 20 minutes for the brain to signal your stomach that you're full,” Brown Riggs said.
“Fast eaters can eat a large amount of food within that 20-minute period causing more calories, which can lead to being overweight or obesity.”
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