Obesity can shorten lifespan for 10 years
www.chinaview.cn 2009-03-18 08:53:27
Print
BEIJING, March 18 (Xinhuanet) -- Those who are extremely obese may live 10 years shorter than they should have lived, according to researchers in UK as quoted by media reports Wednesday.
An overweight pedestrian sits on a wall outside the Houses of Parliament in London in this file photo. (Xinhua/Reuters File Photo)Photo Gallery>>>
The researchers examined the findings of 57 studies involving about 900,000 adults from the United States and Europe and followed them for 10 to 15 years. About 70,000 of the participants died in the course of the study.
They used the BMI (body mass index) measures and found that those who are about 40 or more pounds (some 18 kg) over a healthy weight may cut about three years off their lives, mostly from heart disease and stroke. Those who are extremely obese, about 100 or more pounds over a healthy weight, could be shortening their lives by as many as 10 years.
Being extremely obese is similar to the effect of lifelong smoking, said Richard Peto, one of the lead researchers and a professor of medical statistics at Oxford University in England.
Above a healthy weight, every 5-point increase in BMI increases the risk of early death by about 30 percent. People with a BMI between 25 and 29.9, which means they are overweight but not obese, could be shortening their life span by a year.
It "provides a much clearer picture of the risk associated with various levels of being overweight or obese," said Michael Thun, emeritus vice president of epidemiological research at the American Cancer Society.
"Once you gain weight, it's hard to lose it and easy to gain more," said Thun, therefore, to stop weight gain became much more important.
(Agencies)
Editor: Mo Hong'e
This blog aims to introduce about Traditional Chinese Medicine (TCM) especially acupuncture, it can treat any sickness and enhance the human immune body.
Selasa, 24 Maret 2009
Rabu, 04 Maret 2009
Study sheds new light on link between obesity, infertility
Study sheds new light on link between obesity, infertility
www.chinaview.cn 2009-03-04 06:32:42
WASHINGTON, Mar. 3 (Xinhua) -- Obese women have alterations in their ovaries which might be responsible for an egg's inability to make an embryo, according to a new study accepted for publication in the U.S. Endocrine Society's Journal of Clinical Endocrinology &Metabolism.
Obese women trying to become pregnant experience longer times to conception, even if they are young and have a regular menstrualcycle. This study sought to determine if there are alterations in an egg's environment in obese women which contribute to poorer reproductive outcomes.
"Characteristics of eggs are influenced by the environment in which they develop within the ovary," said Rebecca Robker, of Adelaide University in Australia and lead author of the study. "Our study found that obese women have abnormally high levels of fats and inflammation in the fluid surrounding their eggs which can impact an egg's developmental potential."
According to Robker, the fats might alter the very sensitive metabolism of the egg and such changes are known to be harmful to embryo formation. In addition, inflammation can damage cells and when this happens to eggs it can affect embryo survival.
For this study, researchers followed 96 women seeking assisted reproduction at a private clinic in South Australia from February 2006 to April 2007. Robker and her colleagues measured hormone and metabolite levels in follicular fluid obtained from the subjects' ovaries during their egg collection procedures. They found that obese women exhibited an altered ovarian follicular environment, particularly increased metabolite and androgen activity levels, which may be associated with poorer reproductive outcomes.
"Obesity is well known to cause changes in blood lipids and heightened inflammation which detrimentally affects a person's general health," said Robker. "Our research shows that obesity similarly changes the environment in the ovary which bathes and nourishes a woman's developing eggs."
Editor: Mu Xuequan
www.chinaview.cn 2009-03-04 06:32:42
WASHINGTON, Mar. 3 (Xinhua) -- Obese women have alterations in their ovaries which might be responsible for an egg's inability to make an embryo, according to a new study accepted for publication in the U.S. Endocrine Society's Journal of Clinical Endocrinology &Metabolism.
Obese women trying to become pregnant experience longer times to conception, even if they are young and have a regular menstrualcycle. This study sought to determine if there are alterations in an egg's environment in obese women which contribute to poorer reproductive outcomes.
"Characteristics of eggs are influenced by the environment in which they develop within the ovary," said Rebecca Robker, of Adelaide University in Australia and lead author of the study. "Our study found that obese women have abnormally high levels of fats and inflammation in the fluid surrounding their eggs which can impact an egg's developmental potential."
According to Robker, the fats might alter the very sensitive metabolism of the egg and such changes are known to be harmful to embryo formation. In addition, inflammation can damage cells and when this happens to eggs it can affect embryo survival.
For this study, researchers followed 96 women seeking assisted reproduction at a private clinic in South Australia from February 2006 to April 2007. Robker and her colleagues measured hormone and metabolite levels in follicular fluid obtained from the subjects' ovaries during their egg collection procedures. They found that obese women exhibited an altered ovarian follicular environment, particularly increased metabolite and androgen activity levels, which may be associated with poorer reproductive outcomes.
"Obesity is well known to cause changes in blood lipids and heightened inflammation which detrimentally affects a person's general health," said Robker. "Our research shows that obesity similarly changes the environment in the ovary which bathes and nourishes a woman's developing eggs."
Editor: Mu Xuequan
Langganan:
Postingan (Atom)