Drinking coffee as soon as one wakes up from a night's sleep greatly affects metabolism (新陈代谢) and blood sugar responses. Scientists published this in the British Journal of Nutrition,
In the study, the UK researchers let 29 healthy men and women take part in three different overnight experiments. In the first two scenes, participants were given a sugary drink upon waking first from a normal night's sleep, and then again after a greatly disturbed night's sleep. In the third, their sleep was similarly, but they were given a strong black coffee 30 minutes before having the sugary drink.
Blood samples from participants were taken following the sugary drinkin each experiment. Results showed that one night of disturbed sleep did not worsen the participants' blood sugar responses at breakfast when compared to a normal night of sleep. However, strong black coffee consumed before breakfast increased the blood sugar response by around 50 percent.
By drinking such kind of drink after breakfast, UK researchers found that our bodies, ability to break down our food healthily is completely improved. Examining the effects of broken sleep and morning coffee through a range of different metabolic markers, researchers found that, while one night of poor sleep had a limited effect on metabolism, drinking coffee before breakfast could have a negative effect on blood sugar control.
“We know that nearly half of us will wake in the morning and, before doing anything else, drink coffee-the more tired we feel, the stronger the coffee is. This study is important and has far-reaching health influences, and it indeed shakes some coffee drinkers. Up to now we have had limited knowledge about what this is doing to our bodies, in particular for our metabolic and blood sugar control, so we have a long way to go. "said Professor James Bette, co-director of the Centre for Nutrition at the University of Bath.
12. How did the UK researchers get the result of the experiment?
A.By theoretical analysis. | B.By comparative experiments. |
C.By doing questionnaires. | D.By consulting journals. |
13. What can we learn from the experiment?
A.A poor night sleep surely affects blood sugar responses. |
B.Drinking coffee after breakfast does much harm to health. |
C.Having strong drinks has a good effect on one's metabolism. |
D.Drinking coffee at different time has different effects on health. |
14. What does James Bette think of the study?
A.It makes no sense. | B.It is limited and blind. |
C.It remains to be continued. | D.It is particular and precise. |
15. What is the text mainly about?
A.Harms of drinking coffee before breakfast. |
B.What weakens ones' blood sugar responses. |
C.How much coffee one should drink a day. |
D.The effective procedure for blood sugar control. |