发布时间：2016-04-15 来源：新东方在线 发布人：
At last, some good news for women whose waistlines wobble.
Females with pot bellies and muffin tops are less likely to break bones than those with perfectly toned tums, research has found.
Men, however, can’t take similar solace in their beer bellies, as the link between waist size and bone strength was apparent only for females.
Researchers tracked the health of more than 1,000 men and women aged 50-plus for an average of five years.
During that time, 19 of the men and 107 of the women broke a bone.
Factoring in the amount of abdominal fat revealed a link between big bellies and breaks in the women. Specifically, the 25 per cent of women with fattest middles were 40 per cent less likely to have broken a bone than those with the flattest midriffs, the Journal of Clinical Endocrinology reports.
The researchers, from Sydney’s Garvan Institute of Medical Research, said the benefit could be due to the extra force placed on bones strengthening them. Fat can also provide valuable padding if an individual falls.
However, they believe the most likely explanation involves the female sex hormone oestrogen.
Women who store fat around their middle tend to have higher levels of oestrogen, and the hormone is good for the bones. The researchers said that their finding could help explain why the number of fractures has gone down as obesity rates have risen around the world.
Project leader Professor Tuan Nguyen said: ‘This study appears to be consistent with the fact that obesity levels are rising worldwide at the same time that fracture incidence is decreasing.’
However, with fat stored around the middle known to pose a particular danger to the heart, as well as raise the risk of diabetes, the researchers are not advocating that women start to cultivate pot bellies.
They also stressed that those who benefited were overweight, rather than obese.
The study is not the first to suggest that, a bit of extra weight is good for health. Researchers who crunched together the results of almost 100 studies involving millions of men and women revealed that those of normal weight, and so usually considered to be in the best health, were more likely to die than those who were slightly overweight.
Being slightly obese also appeared to do little harm. However, those who were any bigger than pleasantly plump were around a third more likely to die during the months or years they were being studied than those of normal weight.
Explanations given include the possibility that those who start out slightly heavier have more reserves to call on if they lose weight due to ill health as they get older.