We all know that a healthy life means getting both plenty of exercise and enough good-quality sleep,but reality often gets in the way.The new research indicates that doing enough exercise could make up for some of the unhealthy impacts of bad sleep.While the health benefits of exercise and sleep are nothing new,it's the relationship between them that is interesting in this particular study — it could even give doctors another option to suggest for patients dealing with sleep problems.
"We found those who had both the poorest sleep quality and who exercised the least were most at risk of death from heart disease,stroke,and cancer," says epidemiologist Bo-Huei Huang,from the University of Sydney in Australia.
Participants were grouped into three levels of physical activity（high,medium or low）and were also given a sleep quality score from 0-5 based on the amount of shut-eye they got,how late they stayed up,insomnia,snoring and daytime sleepiness.
Those with the highest risk of dying from cancer or heart disease during the study period were those with the worst quality sleep and who didn't meet the WHO recommended guidelines for exercise.That risk went down for people with poor quality sleep but who did meet the exercise guidelines.
In the case of all forms of cancer,for example,those at the unhealthiest end of the sleep and exercise scale had a 45 percent higher risk of dying from cancer than those with good sleep scores who kept physically active.However,that risk just about disappeared for those who didn't score well on sleep but did score well on physical activity.
For now it's not clear why more exercise might make up for poor sleep,as far as our health goes.It could be that the increased activity is counteracting inflammation（炎症），or reducing irregularities in glucose metabolism,suggest the researchers.
"Considering that physical activity is perhaps more modifiable than sleep,our study offers people more health incentives to be physically active." says population health researcher Emmanuel Stamatakis,from the University of Sydney.



This research is of particular interest in that ______ .

A. it's in this study that exercise is known to be beneficial to sleep.
B. this study offers people more health treatments to be physical active.
C. it could enable doctors to cure patients of their sleeping condition.
D. the relationship between exercise and sleep is updated in this study.

Which of the following statements is true according to the passage？ ______

A. Those who had the poorest sleep quality were most at risk of death from heart disease.
B. Those scoring lowest on sleep and exercise scale were more likely to die from cancer.
C. There's no risk of cancer for those who didn't sleep well but did score well on physical activity.
D. It's evident that in terms of health more exercise could make up for poor sleep.

What does the underlined word in Paragraph 6 mean？ ______

A. interacting
B. increasing
C. preventing
D. causing

Where can this passage most probably be taken from？ ______

A. A research findings report.
B. A medical examination report.
C. A poor sleep study report.
D. A physical activity study report.