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女性多吃蔬果可使身材苗条
发布时间:2010-12-03 04:13     来源:君健网

  加拿大一项研究显示,多吃蔬菜、水果不仅能让人保持身材苗条,还有助降低女性骨折几率。

  营养密度加拿大麦基尔大学莉萨·兰塞特莫带领同事随访3539名已绝经女性和1649名50岁及以上男性,研究营养密度与骨折关系。营养密度指的是食物中营养与热量的比值。

  研究人员认为,营养密度高的食物包括水果、蔬菜、谷物、豆类和鱼;营养密度低、热量密度高的食物有甜品、土豆片以及加工肉类。

  有益骨骼研究人员发现,从整体来看,女性从水果、蔬菜和其他营养密度高的食物中获取的热量每增加40%,今后十年中骨折的几率就降低14%。即使考虑到体重、骨密度、吸烟习惯以及是否服用钙和维生素D补剂等多种影响因素,这一关系依然成立。研究人员在男性调查对象中也发现类似情况,但比例低,不具实际意义。另外,研究人员没有发现骨折风险与热量密度高的食品存在关联。

  兰塞特莫说,研究结果并不意味着食用营养密度高的食物能避免骨折,它传达的意思是:营养密度高的食物更健康,不仅可以降低心脏病与糖尿病风险,还可能对骨骼健康有益。

  先前科学家就饮食习惯与骨骼健康关系进行过大量研究,发现服用钙与维生素D能增加骨量,同时能降低老年人骨折几率。不过,科学家没有研究过整体饮食习惯与骨折的关系。

  “先前研究表明,饮食习惯与几种不利的健康结果有关,”兰塞特莫说,“但人们并不理解它与骨骼脆弱性间关系。”她说,那些喜欢吃营养密度高食物的人与不爱吃蔬菜的人相比,健康意识更强,锻炼更多,抽烟更少。

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