高海拔可有效预防肥胖--你相信吗

  近日，一项发表于欧洲肥胖会议（European Congress on Obesity）上的研究报告中，来自西班牙纳瓦拉大学(University of Navarra)的研究人员通过研究表示，生活在高海拔地区的人们或许不太可能患过重或者肥胖。
  早期研究中，研究者对9300多名非过重或肥胖的西班牙大学毕业生进行了研究，根据这些参与者的家庭所在的海拔分为三组，即低于407英尺（低海拔地区）、407—1496英尺（中等海拔地区）及高于1496英尺（高海拔地区）；在进行了平均长达8.5年的跟踪研究中，大约有2100名参与者发展成了肥胖或过重，在考虑其它因子后，比如饮食及体育锻炼等，研究者表示，相比低海拔地区的参与者而言，生活在高海拔地区的参与者发展成为肥胖和过重的可能性要比前者低13%。
  然而本项研究还发现了居住海拔和个体体重之间的关系，但这并不能表明生活所在的特定海拔高度会引起体重的改变；研究者说道，虽然不太可能让每个个体都转移到高海拔地区居住来降低人们的肥胖水平，但我们的确观察到了高海拔对于个体体重的正向作用效应。
  此前研究揭示，高海拔地区空气中的低浓度氧和较低的肥胖比率直接相关，研究者认为，空气中氧气浓度较低或许会抑制饥饿感。后期研究者还将进行更多的研究和探讨来阐明为何高海拔会引发个体体重降低，从而有效预防肥胖。（转化医学网360zhyx.com）
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People who live at higher altitudes are less likely to become overweight or obese, a new study suggests.

The research included more than 9,300 Spanish university graduates who were not overweight or obese at the start of the study. They were divided into three groups based on their homes' altitude: below 407 feet (low); 407 to 1496 feet (medium); and above 1496 feet (high).

Over a median follow-up of 8.5 years, nearly 2,100 of the participants became overweight or obese. After accounting for other factors, such as diet and physical activity, the researchers concluded that study participants who lived at high altitudes were 13 percent less likely to become overweight or obese than those who lived at low altitudes.

However, while the study did find an association between altitude and weight, it wasn't designed to show that living at a certain altitude can actually cause changes in weight.

"While it might not be realistic to expect everyone to move further uphill to reduce obesity levels, it is encouraging to see this effect occurred at only [about 1,500 feet] altitude," the study authors from the University of Navarra in Spain reported.

Previous research has suggested that lower concentrations of oxygen in the air at higher altitudes are associated with lower obesity rates. It's believed that lower concentrations of oxygen in the air may suppress hunger, according to the researchers.

The study was to be presented Thursday at the European Congress on Obesity, in Prague. Findings presented at meetings are generally considered preliminary until published in a peer-reviewed journal.