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苏医77级

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亲爱的同学们,三十年前我们有缘相聚在苏医的校园。如今我们志在四方,分散在海内外。这里是我们的共同家园。抽点空闲常回家看看:吐一吐创业的酸甜苦辣,诉一诉家中的天伦之乐,表一表同窗的难忘友谊,谈一谈学术的独到见解,讲一讲医学的科普知识...... 投稿邮箱:suyi77ji@163.com

研究显示长期久坐看电视寿命可能短好几年  

2010-01-22 07:13:28|  分类: 转载 |  标签: |举报 |字号 订阅

  下载LOFTER 我的照片书  |

徐军老同学提醒大家久坐有害健康,甚至是致命的。搜索到广州日报2010/01/17  的   相关的文章,转载于此: 

久看电视伤健康

  如果你是成天窝在沙发上看电视的宅男或宅女,那可得注意了。一项最新研究发现,坐着看电视的时间太长会使人患病的可能性大大增加,人的寿命也将因此缩短好几年。更重要的是,对于久坐在电视机前所造成的伤害,即使通过锻炼也无法弥补。

  澳大利亚墨尔本贝克IDI心脏和糖尿病研究所研究发现:排除吸烟、高胆固醇、高血压、不良饮食等因素,与那些每天看电视少于两小时的人相比,每天看电视超过4小时者死于心脏病的可能性增加80%,死于其他各种疾病的可能性增加46%。

  该研究结果11日发布在美国心脏学会的官方出版物《循环》上,它是由澳大利亚和法国研究学者共同研究得出的。

  研究者对8800名平均年龄25岁的健康男女做了长达六年半的跟踪研究。这些人被分成三组研究,一组每天看电视少于2小时,另一组每天看2~4小时,最后一组每天看4小时以上。结果显示,在电视机前多坐1小时,死于心脏病的可能性增加18%,死于其他各种疾病的可能性增加11%。

  久坐办公室危害也大

  看电视是人们普遍喜欢的业余活动。此前有调查发现,英国人平均每天看3小时电视,美国人每天平均看5小时电视。

  领衔此次研究的大卫·邓斯坦表示,看电视其实并非是直接导致折寿的原因,真正的原因是长期坐着无所事事。同理,在办公室长期坐着也对健康有害无益。邓斯坦认为,长时间看电视必然久坐,这意味着肌肉缺乏运动,而肌肉长时间不运动,人的新陈代谢就会紊乱。

  更重要的是,研究显示,锻炼弥补不了久坐在电视机前所造成的伤害。邓斯坦和他的同事们对试验参与者进行了数据分析,结果发现,虽然进行了同样的锻炼,但是看电视时间长的人死亡风险仍然高出不少。

久坐看电视还有其他危害

  本报讯 在美国医生彼得·卡茨马季克看来,看电视比其他伏案工作对健康更不利。他认为,久坐看电视可能还会附带产生其他许多不健康的习惯。卡茨马季克一直在研究久坐对健康的影响。“读书或者做家务并不像看电视那样危险。”他说,“我们还不能确定对健康有害的究竟是久坐本身还是人们在看电视时情不自禁地所做的事情,比如吃零食。”

  但邓斯坦和他的同事指出,由于此项研究对饮食和热量的摄入有控制,吃零食不能解释死亡风险上升的现象。不过,邓斯坦同意看电视时吃垃圾食品和缺乏活动对健康有着不好的影响。

  两位专家都认为,运动对健康很重要,但避免长时间坐着同样重要。卡茨马季克建议伏案工作的人们尽可能找机会站起来走动两下。邓斯坦也建议说:“一定要站起来动一动,你动得越多,你就越健康。”

     穿跑鞋跑步或致关节损伤

  专家表示 人们应该选择跑步时让自己感觉最舒适的鞋

  据新华社电 美国研究人员发现,穿着市面上流行的跑鞋跑步可能比赤足或穿高跟鞋跑步更易引起关节劳损,造成膝盖、髋部和踝关节损伤。

  这项研究结果刊载于美国物理医疗与康复学会期刊《理疗与康复》。

  比高跟鞋易致关节损伤

  研究负责人、弗吉尼亚大学理疗与康复教授凯西·克里根表示,跑步或散步会增加对一些关节的压力,可能导致膝盖、髋部和脚踝等部位软骨损伤,引发骨关节炎,使骨头之间直接摩擦引起疼痛。

  克里根和同事们先前所做的研究显示,女性穿高跟鞋会使膝关节比赤脚时承受更多压力,容易导致关节损伤。他们的最新研究发现,跑鞋比高跟鞋更易引起关节损伤,因为跑鞋里的软垫虽然增加了弹性,提高了穿着舒适度,但同样提升了鞋的高度。

  赤脚跑步也未必好

  根据这一研究结果,我们跑步时最好赤脚。但研究人员并不认同。克里根说,即使裸足跑也要看在何种材质上。跑鞋虽然在某些方面不利于膝关节,譬如足弓垫,但跑鞋确实对脚部起到保护作用,也可以避免胫骨骨膜炎等损伤。因此克里根建议:“跑鞋也好,普通鞋也罢,人们应该选择跑步时让自己感觉最舒适的鞋。”

引自http://tech.ynet.com/view.jsp?oid=62784458

徐军推荐的原文见 http://news.yahoo.com/s/ap/20100120/ap_on_he_me/eu_med_dangers_of_sitting

Experts: Sitting too much could be deadly

研究显示长期久坐看电视寿命可能短好几年 - 孺子牛 - 苏医77级

  • 359 votes 研究显示长期久坐看电视寿命可能短好几年 - 孺子牛 - 苏医77级 TE>Reuters – A generic picture of a woman working in an office sitting at her desk typing on a computer. REUTERS/Catherine … TE>
  • TE>By MARIA CHENG, AP Medical Writer Maria Cheng, Ap Medical Writer TE>– Wed Jan 20, 4:55 pm ET

    LONDON – Here's a new warning from health experts: Sitting is deadly. Scientists are increasingly warning that sitting for prolonged periods — even if you also exercise regularly — could be bad for your health. And it doesn't matter where the sitting takes place — at the office, at school, in the car or before a computer or TV — just the overall number of hours it occurs.

    Research is preliminary, but several studies suggest people who spend most of their days sitting are more likely to be fat, have a heart attack or even die.

    In an editorial published this week in the British Journal of Sports Medicine, Elin Ekblom-Bak of the Swedish School of Sport and Health Sciences suggested that authorities rethink how they define physical activity to highlight the dangers of sitting.

    While health officials have issued guidelines recommending minimum amounts of physical activity, they haven't suggested people try to limit how much time they spend in a seated position.

    "After four hours of sitting, the body starts to send harmful signals," Ekblom-Bak said. She explained that genes regulating the amount of glucose and fat in the body start to shut down.

    Even for people who exercise, spending long stretches of time sitting at a desk is still harmful. Tim Armstrong, a physical activity expert at the World Health Organization, said people who exercise every day — but still spend a lot of time sitting — might get more benefit if that exercise were spread across the day, rather than in a single bout.

    That wasn't welcome news for Aytekin Can, 31, who works at a London financial company, and spends most of his days sitting in front of a computer. Several evenings a week, Can also teaches jiu jitsu, a Japanese martial art involving wrestling, and also does Thai boxing.

    "I'm sure there are some detrimental effects of staying still for too long, but I hope that being active when I can helps," he said. "I wouldn't want to think the sitting could be that dangerous."

    Still, in a study published last year that tracked more than 17,000 Canadians for about a dozen years, researchers found people who sat more had a higher death risk, independently of whether or not they exercised.

    "We don't have enough evidence yet to say how much sitting is bad," said Peter Katzmarzyk of the Pennington Biomedical Research Center in Baton Rouge, who led the Canadian study. "But it seems the more you can get up and interrupt this sedentary behavior, the better."

    Figures from a U.S. survey in 2003-2004 found Americans spend more than half their time sitting, from working at their desks to sitting in cars.

    Experts said more research is needed to figure out just how much sitting is dangerous, and what might be possible to offset those effects.

    "People should keep exercising because that has a lot of benefits," Ekblom-Bak said. "But when they're in the office, they should try to interrupt sitting as often as possible," she said. "Don't just send your colleague an e-mail. Walk over and talk to him. Standing up."

     

 

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