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【medical-news】久坐对健康不利
Taking Even Short Breaks From Sitting Is Good for Your Heart, Waist
By Siobhan Harris
WebMD Health NewsReviewed by Keith Barnard, MD Jan. 12, 2011 -- We all know that regular exercise is good for our health and too much sitting isn’t ideal. Now a new study suggests it’s not just the length of time we spend sitting down but the number of times we get up during that time that can influence our health.
The study, published online in the European Heart Journal, examined the total length of time people spent sitting down and breaks taken in that time, together with various indicators of risk for heart disease, metabolic diseases such as diabetes, and inflammatory processes that can play a role in the blocking of arteries.
It suggests that plenty of breaks, even if they are as short as one minute, seem to be beneficial.
Take a Break to Slim Your Waist
The Australian research found that long periods of sitting down, even in people who did a lot of exercise otherwise, were associated with worse indicators of cardio-metabolic function and inflammation, such as larger waist circumferences, lower levels of HDL ("good") cholesterol, and higher levels of C-reactive protein (an important marker of inflammation) and triglycerides (blood fats).
However, the study also found that even in people who spent a long time sitting down, the more breaks they took during this time, the smaller their waists and the lower the levels of C-reactive protein.
Genevieve Healy, MD, from the University of Queensland led the study.
“The most significant differences were observed for waist circumference," she says. "The top 25% of people who took the most breaks had, on average, a 4.1 cm smaller waist circumference than those in the lowest 25%."
The dangers of being too big around the middle are well-documented.
According to the National Heart, Lung, and Blood Institute, high-risk waist circumferences are:
Over 40 inches for men.
Over 35 inches for women.
Healy and her colleagues analyzed earlier U.S. data from nearly 5,000 people aged 20 and over.
The participants wore a small device called an accelerometer, which monitored the amount and intensity of walking or running.
It gave researchers information on sedentary time and breaks in sedentary time.
Small Changes Help
"The potential adverse health impact of prolonged sitting (which is something that we do on average for more than half of our day), is only just being realized," Healy says. "Our research highlights the importance of considering prolonged sedentary time as a distinct health risk behavior that warrants explicit advice in future public health guidelines.”
The study suggests even small changes could help, like standing up to take phone calls, walking to see a colleague rather than phoning or emailing, and centralizing trash cans and printers so you have to walk to them.
Amy Thompson, Senior Cardiac Nurse at the British Heart Foundation, says in a statement, “This study was a very interesting read and adds to well established evidence that long periods of inactivity are not good for the heart.
“If you’re sitting for long periods it’s really important you take regular breaks by getting up on your feet. Regular physical activity is essential to protect cardiovascular health.” 认领此文 媒体稿件 - 薄三郎 - 博客大巴及时的就诊医治,才能更健康的工作与生活. 或许唯有此,才能让这一生命杀手像臭哑弹一... 经过长期跟踪研究,科学家发现EV71中的A型病毒多在美国加利福尼亚州传播,而B型和C型...shonline.blogbus.com/c3068550/-2009-10-16-快照-Tianmin's Place 的日志 — Windows Livemedical purpose 医学用途 medicinal purpose 医药用途 memory n .计忆 menstrual ... right of subsistence 生命权 rubella n .[医]风疹 scientific gain 科学成果 scientifically ...jtianmin1975.spaces.live.com/...-2011-01-25-快照-安邦保险行业资料汇编文件类型:DOC/Microsoft Word- 文字版〖政策动态〗 5 【保险公司对封闭式基金“发难”见成效】 5 【保监会为投资境外保险... 合众人寿 9649.51 华泰人寿 129.46 人保健康 74.73 平安养老 0.00 国信人寿 0.00 ...www.sztechlib.net.cn/...26.doc-2011-01-20-[标签:content2]
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作者:admin@医学,生命科学 2011-02-17 17:24
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