A new study suggests drinking coffee as soon as someone wakes up from a poor night's sleep greatly affects metabolism（新陈代谢）and blood sugar control.
In the study, published in the British Journal of Nutrition, 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 poor night's sleep during which they were woken up for five minutes every hour. In the third, their sleep was similarly disrupted, but they were given a strong black coffee 30 minutes before consuming the sugary drink.
Blood samples from participants were taken following the sugary drink, which mirrored the calories of a typical breakfast, in each experiment. Results showed that one night of disrupted 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 across a range of different metabolic markers, scientists at the University of Bath 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 moves some coffee drinkers' heartstrings. As 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 Betts, co-director of the Centre for Nutrition, Exercise and Metabolism at the University of Bath.
