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  3. For man and women under 30, smoking does not prevent typical age-related weight gain, according to a study of nearly 4,000 white

For man and women under 30, smoking does not prevent typical age-related weight gain, according to a study of nearly 4,000 white

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问题     For man and women under 30, smoking does not prevent typical age-related weight gain, according to a study of nearly 4,000 white and black young adults ages 18 to 30.【F1】The tobacco industry has named cigarettes "thins" and "slims" in an attempt to appeal to weight-conscious young women who think that smoking will help them control their weight, but this study indicates that smoking has a negligible effect on body weight.
    The researchers classified participants into six groups based on self-reported smoking status. Participants’ self-reported smoking status and body weight were reassessed at two-, five-, and seven-year follow-ups. The researchers found minimal evidence of any weight control benefit from smoking. Those who smoked, or who began smoking, did not lose weight.
    【F2】While smoking was associated with an attenuation of weight gain among black adults, no such effect occurred among white men or women, the latter being the group most likely to smoke "to control body weight".
    【F3】The finding of little immediate or even long-term(seven years)weight-control benefit from smoking among young adults goes against the beliefs of both smokers and nonsmokers that smoking helps to control or to limit weight gain. Any weight control benefit derived from smoking is likely to take many years, according to the researchers.
    The researchers also found that individuals who quit smoking experienced greater weight gain than individuals who continued smoking or never smoked at all. While smoking is not a successful mechanism for weight control, smoking cessation does have serious long-term consequences for body weight.
    "These findings have important public health implications, since the perception that smoking controls body weight is widespread, particularly among youth," said Dr. Klesges, lead author of the study.【F4】"Every day, many young Americans begin smoking believing that it will help them lose weight," but these results demonstrate that smoking does not help control weight, and only after decades of smoking do we see a difference in body weights of smokers and non-smokers.
    "If young people throughout the nation can learn that smoking has no effect on body weight, it is likely that a significant reduction among smoking in youth would be observed. "
    【F5】The authors suggest that future research should look at the effects of smoking on body weight among younger participants, since the pre-teen and teenage years are when individuals typically start smoking. While this research focused on smoking and weight gain among whites and blacks, future studies should also gauge whether these findings apply to other ethnic groups.
【F4】
选项
答案“每天都有很多美国年轻人开始学吸烟。他们认为，吸烟能帮助他们减肥。”但是，这些研究结果表明，吸烟无助于控制体重；只有吸了几十年烟以后，才能看出吸烟者的体重与不吸烟者的区别。
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