www射-国产免费一级-欧美福利-亚洲成人福利-成人一区在线观看-亚州成人

   

WORLD / Health

Heavy people may collapse more in heat
(AP)
Updated: 2006-08-03 17:14

ATLANTA - Obese people face a higher risk of passing out, or worse during heat waves, some health experts say.

Layers of fat make it extra difficult for a body to dissipate heat, or to move to a cool location. Add in diabetic dehydration and other conditions common in the obese, and it's a recipe for trouble.

"ER physicians will tell you that they (obese people) are the ones collapsing," said Thomas Adams, a Michigan State University physiologist.

Federal health officials list obesity as a risk factor for heat-related illness, but health warnings generally focus on the dangers to children, the elderly and the socially isolated. Those are the groups considered most in danger of fatal heat stroke, health officials said.

But non-fatal heat exhaustion may hit obese people more quickly than thinner folk, said Adams, author of the 1993 book 'Guidelines for Surviving Heat and Cold.'

Fat is a natural insulator that traps core body heat, experts said. While that may be a boon in the winter, it's a burden for someone stuck in summer heat.

The body cools itself by circulating blood to dissipate heat through the skin. A heavy person's heart must pump harder to circulate blood on a hot day.

When a person is standing up, the most difficult place to circulate blood to is the brain. So inadequate circulation can cause someone to be lightheaded and to faint, Adams explained.

People also cool off by sweating. An obese person who cannot dissipate heat through circulation will sweat more, meaning they lose water and body salts to become more quickly dehydrated, he added.

The risk of heat-related death seems to rise with the degree to which a person is overweight, but scientists haven't determined at what level of being overweight the danger truly escalates, said George Luber, an epidemiologist with the U.S. Centers for Disease Control and Prevention.

In the years 1999 through 2003, about 1,200 U.S. deaths were reported in which heat-related illness was a major factor, according to a CDC report published last week. The report did not examine obesity as a risk factor, but found cardiovascular disease was an underlying cause of death in 57 percent of those cases and diabetes was in 3 percent of those cases.

"People who are obese tend to suffer more from cardiovascular disease," noted Luber, who co-authored the report. "Obesity kind of represents several risk factors rolled into one."

Everyone is at risk during a severe heat wave, but it makes sense for obese people to be cautious, said Dr. Arthur Kellermann, a professor of emergency medicine at Atlanta's Emory University.

"If they read this article and say 'Well I am kind of heavy, I should be careful,' that's good," Kellermann said.

 
 

主站蜘蛛池模板: 农村寡妇一级毛片免费看视频 | 在线视频 一区二区 | 欧美成人高清在线视频大全 | 狠狠狠狠狠 | 久久精品视频免费 | 亚洲最大免费视频网 | 日韩欧美视频一区二区 | 青草欧美 | 久久精品国产午夜伦班片 | 久久亚洲国产的中文 | 国产女厕偷窥系列在线视频 | 国产欧美日韩综合精品无毒 | 免费一级特黄 欧美大片 | 欧美日韩成人 | 亚洲三级在线 | 99久久伊人一区二区yy5099 | 韩日三级视频 | 狠狠色狠狠综合久久 | 久久久久亚洲国产 | 久久免费99精品久久久久久 | 国产黄色片在线观看 | 亚洲手机视频 | 一区二区亚洲精品 | 日本免费在线视频 | 中国一级做a爰片久久毛片 中日韩欧美一级毛片 | 男人女人做黄刺激性视频免费 | 在线免费看一级片 | 毛片免费观看日本中文 | 美女张开腿黄网站免费国产 | 香港全黄一级毛片在线播放 | 久久精品国产福利 | 草草影院在线播放 | 国内真实愉拍系列情侣自拍 | 午夜在线精品不卡国产 | 欧美成人国产一区二区 | 337p粉嫩大胆噜噜噜鲁 | 国产精品一区伦免视频播放 | 欧美另类久久久精品 | 国产亚洲一区二区在线观看 | 成人满18在线观看网站免费 | 成年人www |