科普知识学英语 怀孕会永久改变足部大小

海量资料下载 免费学习英语 www.englishvip.com/xinlw.htm （申请网址） A new University of Iowa study confirms what many women have long suspected -- that pregnancy permanently changes the size and shape of a woman's feet. Flat feet are a common problem for pregnant women. The arch（拱形） of the foot flattens out, possibly due to the extra weight and increased looseness (laxity) of the joints associated with pregnancy. The new study, published in the March issue of the American Journal of Physical Medicine & Rehabilitation, suggests that this loss of arch height is permanent.   "I had heard women reporting changes in their shoe size with pregnancy, but found nothing about that in medical journals or textbooks," says Neil Segal, M.D., UI associate professor oforthopaedics（整形外科） and rehabilitation. "In order to study this more scientifically, we measured women's feet at the beginning of their pregnancy and five months after delivery. We found that pregnancy does indeed lead to permanent changes in the feet."   The UI study followed 49 pregnant women and collected static and dynamic arch measurements during the first trimester（早期妊娠） of pregnancy and again about five months after childbirth. The researchers found that for about 60 to 70 percent of the women in the study, their feet became longer and wider.   Specifically, the study showed that, on average, arch height and measures of arch rigidity decreased significantly comparing early pregnancy with five months after childbirth, causing corresponding increases in foot length (between 2 and 10 mm) and arch drop. However, no significant change in the distribution of foot pressure was detected. The study also suggested that first pregnancies may account for most of the observed changes, while second, third, or higher pregnancies may not further alter foot structure.   "We know that women, and especially women who have had children, are disproportionately affected by musculoskeletal disorders," says Segal, who also is an associate professor of radiology and epidemiology, and director of the Clinical Osteoarthritis Research Program. "It is possible that these foot changes that occur during pregnancy may help explain why, in comparison with men, women are at higher risk for pain or arthritis in their feet, knees, hips and spines."   Segal plans to conduct follow-up studies to assess whether these foot changes lead to health problems, like arthritis（关节炎）, later in life. He also is conducting studies of how women'smusculoskeletal（肌骨骼的） health can be protected during pregnancy.   In addition to Segal, the research team included Elizabeth Boyer; Patricia Teran-Yengle; Natalie Glass; Howard Hillstrom; and John Yack. The study was funded in part by grants from the American Geriatrics Society and the National Institute on Aging. The research team can be contacted at 319-335-7900.   衣阿华研究证实，许多妇女一直怀疑一个新的大学-怀孕永久改变一个女人的脚的大小和形状。扁平足是一种常见的问题，用于孕妇。（拱形）拱脚变平，可能是由于额外的重量和增加与怀孕有关的关节松动（松弛）。这项新的研究，发表在美国物理医学与康复杂志三月号的，建议拱高度，这一损失是永久性的。   “我听说过鞋的大小与怀孕的妇女报告的变化，但什么也没找到，在医学期刊或教科书，”尼尔·西格尔说，MD，UI 骨科副教授（整形外科）和康复。“为了研究更科学，我们测量女性的脚开始在他们的怀孕和分娩后五个月。我们发现，怀孕确实在脚上导致永久性的变化。”   UI研究随访了49名孕妇在第一孕期（早期妊娠）妊娠和分娩的后再次约5个月，收集测量静态和动态拱。研究人员发现，约60％至70％的妇女在研究中，他们的脚变长，变宽。   具体来说，该项研究表明，平均而言，拱高和拱刚性措施显著下降比较早期妊娠与分娩后五个月，造成相应增加脚长（2至10毫米），弓降。然而，足压的分布没有显着的变化进行检测。研究还表明，第一次怀孕可能占到大部分观测到的变化，而第二，第三，或更高的怀孕可能不会进一步改变足部结构。   “我们知道，妇女，尤其是有孩子的妇女，肌肉骨骼疾病不成比例的影响，”西格尔说，谁也放射学和流行病学副教授，临床骨关节炎研究计划主任。“这是可能的，这些脚在怀孕期间所发生的变化可能有助于解释为什么在与男性相比，女性在他们的脚，膝盖，臀部和刺痛或关节炎的风险较高。”   西格尔计划进行后续研究，以评估这些脚的变化是否会导致健康问题，如关节炎（关节炎），在以后的生活。他也正在研究如何使妇女的骨骼肌肉（肌骨骼的），在怀孕期间可以保护健康。   除了西格尔的研究小组成员包括伊丽莎白·博耶帕特里夏特兰Yengle的;娜塔莉玻璃;霍华德Hillstrom;和约翰废话。资助这项研究是由美国老年医学会和美国国家老龄问题研究所的拨款，部分。该研究小组可以联系319-335-7900。   “成千上万人疯狂下载。。。。。。 更多价值连城的绝密英语学习资料， 洛基内部秘密英语，技巧，策略 请在 网上 申请报名” 洛基国际英语 竭诚为您服务