Many people struggle to keep their weight in check as getting older.Now new research at Karolinska Institute in Sweden has found that lipid turnover（脂質(zhì)代謝） in the fat tissue（組織）decreases when people are getting older，which makes it easier to put on weight，even if we eat less or exercise more than before.
The scientists studied the fat cells in 54 men and women over an average period of 13 years.In that time，all subjects，regardless of whether they gained or lost weight，showed decreases in lipid turnover in the fat tissue，and that is the rate at which lipid （or fat） in the fat cells is removed and stored.Those who didn't make up for that by eating fewer calories gained weight by an average of 20 percent，according to the study done together with researchers at Uppsala University in Sweden and the University of Lyon in France.
The researchers also examined lipid turnover in 41 women who experienced bariatric surgery（減肥手術(shù)） and how the lipid turnover rate affected their ability to keep the weight off four to seven years after surgery.The result showed only those who had a low rate before the surgery managed to increase their lipid turnover and maintain their weight loss.
"For the first time，the results showed that processes in our fat tissue rule changes in body weight during aging in a way that is independent of other factors，"says Peter Arner，one of the study's main authors."This could open up new ways to deal with obesity（肥胖）."
Earlier studies have shown one way to speed up the lipid turnover in the fat tissue is to exercise more.This new research supports this and further shows the long-term result of weight-loss surgery would improve if combined with increased physical activity.
Obesity and obesity-related diseases have become a global problem.Understanding the change in lipids and what rules the size of the fat mass in humans has never been so significant to us.Therefore，let's expect the researchers to have more findings in this field to help us keep a healthy body.
（1）What's the study about？ BB
A．How physical activities change body weight.
B．Why people gain weight during aging.
C．Why people enjoy losing weight.
D．How a balanced diet benefits us.
（2）What can we learn from Paragraphs 2 and 3？ BB
A．Men have a much higher lipid turnover rate than women.
B．The amount of fat tissue decreases with people getting older.
C．People with a low lipid turnover rate can lose weight surgically.
D．The study result was discovered by Swedish scientists independently.
（3）What can be inferred from Peter Arner's words in Paragraph 4？ DD
A．Scientists understand the lipid turnover rate for the first time.
B．Doing more exercise will surely increase the lipid turnover rate.
C．The lipid turnover has little connection with body weight.
D．Knowing about the lipid turnover rate may help treat obesity.
（4）What is the author's attitude towards the research？ AA
A．Favorable.
B．Surprised.
C．Negative.
D．Doubtful.
【答案】B；B；D；A
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發(fā)布：2024/4/20 14:35:0組卷：0引用：1難度：0.5
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