2. 职称英语
  3. As men age, they typically get less and less deep sleep—a fact that could【B1

As men age, they typically get less and less deep sleep—a fact that could【B1

游客2023-07-03  52
问题     As men age, they typically get less and less deep sleep—a fact that could【B1】______ the weight gain that often【B2】______ middle-age, medical researchers said this week.
    The link between sleep and "love handles"(俚语，腰部赘肉), double chins and expanding paunch(大肚子) centers on a hormone【B3】______ produced during deep sleep, the scientists from the University of Chicago reported in the August 16 issue of The Journal of the American Medical Association.
    With less deep or slow-wave sleep, there is less bodily production of the growth hormone. That deficiency is associated with increased fat tissue and abdominal obesity, reduced muscle mass and strength and reduced exercise【B4】______. These results are particularly noted in the elderly.
    The researchers found that deep sleep in men younger than 25 was about 20 percent of a night’s sleep. Between age 25 and 35, the deep sleep【B5】______ about 12 percent After age 35, it’s 5 percent or less. By the time men reach 45, they have nearly lost the ability to【B6】______ and after age 50, men’s total sleep declines by about 27 minutes per【B7】______ of age.
    The researchers said any treatment to improve a man’s sleep would need to begin at age 35-40. A new drug is tested to see if it will increase deep sleep.【B8】______ other than medicine can 【B9】______ deep sleep—for example, increasing body heat by taking a hot bath before bed Exercising at least 20 minutes three or four times a week is also【B10】______. [br] 【B4】
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答案 capacity
解析 此空需要名词，与前面的fat tissue，obesity，muscle mass and strength并列，作介词with的宾语。exercise capacity“运动能力”。
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