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£¨2021·ºþ±±¸ßÈýÔ¿¼£©    A strong coffee after a poor night's sleep is the kick-start many people need in the morning but new research suggests that it might be best to have a bite to eat first.

A study has found that drinking coffee first can have a negative effect on blood sugar control - a risk factor for diabetes £¨ÌÇÄò²¡£©and heart disease.

“We know that nearly half of us will wake in the morning and, before doing anything else, drink coffee --- subjectively the more tired we feel, the stronger the coffee,“ said Professor James Betts, at the University of Bath in the UK.

For their study, researchers at the University of Bath got 29 healthy men and women to take part in three different overnight experiments, with at least a week between them.

In one, the participants had a normal night's sleep, roughly from 11 p.m. to 7 a.m., and were asked to consume a sugary drink on waking in the morning. They then experienced an interrupted night's sleep, where the researchers woke them every hour for five minutes by sending them text messages to which they had to respond — and upon waking were given the same sugary drink.

On another night, participants experienced the same sleep interruption, but this time were first given a strong black coffee 30 minutes before consuming the sugary drink.

They found that one night of interrupted sleep did not worsen the participants' blood sugar and insulin £¨ÒÈ µºËØ£©responses when compared to the normal night's sleep-- although previous research suggested that losing many hours of sleep or many nights of poor sleep could have a negative effect. However, strong black coffee consumed before breakfast actually increased the blood sugar response by around 50% — suggesting that relying on coffee after a bad night to stop feeling sleepy could limit your body's ability to tolerate the sugar in your breakfast.

1£®What does the underlined word “kick-start" in paragraph 1 refer to?

A£®A kind of sport.                     B£®A kind of power.

C£®A kind of medicine.                  D£®A kind of belief.

2£®What was unchanged in the three experiments?

A£®The duration of sleep.               B£®The blood sugar response.

C£®The sugary drink.                    D£®The intake of coffee.

3£®What increased the participants' blood sugar response most before breakfast?

A£®A normal sugary drink.

B£®A normal night's sleep.

C£®An interrupted night's sleep.

D£®A cup of strong black coffee.

4£®How did researchers draw the conclusion?

A£®By comparing the results.

B£®By listing some examples.

C£®By surveying the participants.

D£®By referring to some documents.