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Originally published August 15, 2012 at 10:55 PM | Page modified August 15, 2012 at 11:42 PM

Diet news is never just plain good.Good would be something like "Eating chocolate causes you to lose weight and gain lean muscle mass, study finds."

The latest, out of Fred Hutchinson Cancer Research Center, is not like that.

Yo-yo dieting, researchers have found, actually doesn't change your metabolism and make it harder to lose weight in future efforts, as widely believed. So just because you've lost and gained, lost and gained, lost and gained, you now have no excuses. Do it again. And likely, again.

Dr. Anne McTiernan, of The Hutch's public health-sciences division, the senior author of the study published online by the journal Metabolism, sees the results as a half-full kind of thing.

"A history of unsuccessful weight loss should not dissuade an individual from future attempts to shed pounds or diminish the role of a healthy diet and regular physical activity in successful weight management," McTiernan said.

The study was designed for a slow, steady and reasonable amount of weight loss 10 percent of body weight within six months and maintenance for the next six with daily calories of 1,200 to 2,000, calculated by each woman's beginning body weight.

Earlier studies have suggested that repetitive weight loss-regain cycles may increase a dieter's preference for dietary fat, perhaps because of changes in metabolic rate, immune function and body composition, the authors noted. But few studies have actually examined this notion, which suggests that somehow dieting causes a person's body to become more efficient at holding onto fat, they said.

For the study, McTiernan and her colleagues enrolled 439 overweight to obese, sedentary Seattle-area postmenopausal women, ages 50 to 75.

Obesity, the researchers said, is a known risk factor for many cancers, as well as for heart disease and diabetes, and with two-thirds of the U.S. population overweight or obese, it's a worry for those in public health.

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Mythbuster: Yo-yo dieting no deterrent to future weight loss, study reveals

Newswise SEATTLE Yo-yo dieting the repetitive loss and regain of body weight, also called weight cycling is prevalent in the Western world, affecting an estimated 10 percent to 40 percent of the population. The degree to which weight cycling may impact metabolism or thwart a persons ability to lose weight in the long run has been unclear until now.

A new study by researchers at Fred Hutchinson Cancer Research Center, published online in the journal Metabolism, for the first time has shown that a history of yo-yo dieting does not negatively affect metabolism or the ability to lose weight long term.

A history of unsuccessful weight loss should not dissuade an individual from future attempts to shed pounds or diminish the role of a healthy diet and regular physical activity in successful weight management, said the studys senior author Anne McTiernan, M.D., Ph.D., a member of the Hutchinson Centers Public Health Sciences Division.

Two-thirds of the U.S. population is currently overweight or obese and it is estimated that nearly half of American women are currently dieting to lose weight. Obesity is a known risk factor for many cancers as well as heart disease and diabetes. A relationship between body fat and the production of certain hormones and inflammatory markers is thought to contribute to increased cancer risk.

We know theres an association between obesity, sedentary behavior and increased risk of certain cancers, McTiernan said. The World Health Organization estimates that a quarter to a third of cancers could be prevented with maintenance of normal weight and keeping a physically active lifestyle.

The study was based on data from 439 overweight-to-obese, sedentary Seattle-area women, ages 50 to 75, who were randomly assigned to one of four groups: reduced-calorie diet only, exercise only (mainly brisk walking), reduced-calorie diet plus exercise and a control group that received no intervention. At the end of the yearlong study, participants on the diet-only and diet-plus-exercise arms lost an average of 10 percent of their starting weight, which was the goal of the intervention.

The analysis aimed to determine whether women with a history of moderate or severe weight cycling were at a disadvantage compared to non-weight-cyclers when it came to losing weight. Of the study participants overall, 18 percent (77 women) met the criteria for severe weight cycling (having reported losing 20 or more pounds on three or more occasions) and 24 percent (103 women) met the criteria for moderate weight cycling (having reported losing 10 or more pounds on three or more occasions).

Although severe weight cyclers were, on average, nearly 20 pounds heavier than non-cyclers at the start of the study, at the end of the study the researchers found no significant differences between those who yo-yo dieted and those who didnt with regard to the ability to successfully participate in diet and/or exercise programs. The cyclers also did not differ from the non-cyclers with regard to the impact of diet or diet-plus-exercise on weight loss, percentage of body fat and lean muscle mass gained or lost. Other physiological factors such as blood pressure, insulin sensitivity, and blood concentrations of hormones such as leptin (which helps make one feel full) and adiponectin (which helps regulate glucose levels) also did not differ significantly among those whose weight fluctuated and those whose did not.

These finding may represent a first in the scientific community. To our knowledge, no previous studies have examined the effect of prior weight cycling on the body composition, metabolic and hormonal changes induced by a comprehensive lifestyle intervention in free-living women, the authors wrote.

The National Institutes of Health, the National Cancer Institute and the Canadian Institutes of Health funded the research. The study also included investigators at Harvard Medical School, the National Cancer Institute and the University of Washington. Note for media only: To obtain a copy of the Metabolism paper, History of Weight Cycling Does Not Impede Future Weight Loss or Metabolic Improvements in Postmenopausal Women, please visit http://www.sciencedirect.com/science/article/pii/S0026049512002417. # # #

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Yo-Yo Dieting Does Not Thwart Weight Loss Efforts or Alter Metabolism Long Term

ScienceDaily (Aug. 14, 2012) Yo-yo dieting -- the repetitive loss and regain of body weight, also called weight cycling -- is prevalent in the Western world, affecting an estimated 10 percent to 40 percent of the population. The degree to which weight cycling may impact metabolism or thwart a person's ability to lose weight in the long run has been unclear -- until now.

A new study by researchers at Fred Hutchinson Cancer Research Center, published online in the journal Metabolism, for the first time has shown that a history of yo-yo dieting does not negatively affect metabolism or the ability to lose weight long term.

"A history of unsuccessful weight loss should not dissuade an individual from future attempts to shed pounds or diminish the role of a healthy diet and regular physical activity in successful weight management," said the study's senior author Anne McTiernan, M.D., Ph.D., a member of the Hutchinson Center's Public Health Sciences Division.

Two-thirds of the U.S. population is currently overweight or obese and it is estimated that nearly half of American women are currently dieting to lose weight. Obesity is a known risk factor for many cancers as well as heart disease and diabetes. A relationship between body fat and the production of certain hormones and inflammatory markers is thought to contribute to increased cancer risk.

"We know there's an association between obesity, sedentary behavior and increased risk of certain cancers," McTiernan said. "The World Health Organization estimates that a quarter to a third of cancers could be prevented with maintenance of normal weight and keeping a physically active lifestyle."

The study was based on data from 439 overweight-to-obese, sedentary Seattle-area women, ages 50 to 75, who were randomly assigned to one of four groups: reduced-calorie diet only, exercise only (mainly brisk walking), reduced-calorie diet plus exercise and a control group that received no intervention. At the end of the yearlong study, participants on the diet-only and diet-plus-exercise arms lost an average of 10 percent of their starting weight, which was the goal of the intervention.

The analysis aimed to determine whether women with a history of moderate or severe weight cycling were at a disadvantage compared to non-weight-cyclers when it came to losing weight. Of the study participants overall, 18 percent (77 women) met the criteria for severe weight cycling (having reported losing 20 or more pounds on three or more occasions) and 24 percent (103 women) met the criteria for moderate weight cycling (having reported losing 10 or more pounds on three or more occasions).

Although severe weight cyclers were, on average, nearly 20 pounds heavier than non-cyclers at the start of the study, at the end of the study the researchers found no significant differences between those who yo-yo dieted and those who didn't with regard to the ability to successfully participate in diet and/or exercise programs. The cyclers also did not differ from the non-cyclers with regard to the impact of diet or diet-plus-exercise on weight loss, percentage of body fat and lean muscle mass gained or lost. Other physiological factors such as blood pressure, insulin sensitivity, and blood concentrations of hormones such as leptin (which helps make one feel full) and adiponectin (which helps regulate glucose levels) also did not differ significantly among those whose weight fluctuated and those whose did not.

These finding may represent a first in the scientific community. "To our knowledge, no previous studies have examined the effect of prior weight cycling on the body composition, metabolic and hormonal changes induced by a comprehensive lifestyle intervention in free-living women," the authors wrote.

The National Institutes of Health, the National Cancer Institute and the Canadian Institutes of Health funded the research. The study also included investigators at Harvard Medical School, the National Cancer Institute and the University of Washington.

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Yo-yo dieting does not thwart weight loss efforts or alter metabolism long term, study finds

Public release date: 14-Aug-2012 [ | E-mail | Share ]

Contact: Kristen Woodward kwoodwar@fhcrc.org 206-667-5095 Fred Hutchinson Cancer Research Center

SEATTLE Yo-yo dieting the repetitive loss and regain of body weight, also called weight cycling is prevalent in the Western world, affecting an estimated 10 percent to 40 percent of the population. The degree to which weight cycling may impact metabolism or thwart a person's ability to lose weight in the long run has been unclear until now.

A new study by researchers at Fred Hutchinson Cancer Research Center, published online in the journal Metabolism, for the first time has shown that a history of yo-yo dieting does not negatively affect metabolism or the ability to lose weight long term.

"A history of unsuccessful weight loss should not dissuade an individual from future attempts to shed pounds or diminish the role of a healthy diet and regular physical activity in successful weight management," said the study's senior author Anne McTiernan, M.D., Ph.D., a member of the Hutchinson Center's Public Health Sciences Division.

Two-thirds of the U.S. population is currently overweight or obese and it is estimated that nearly half of American women are currently dieting to lose weight. Obesity is a known risk factor for many cancers as well as heart disease and diabetes. A relationship between body fat and the production of certain hormones and inflammatory markers is thought to contribute to increased cancer risk.

"We know there's an association between obesity, sedentary behavior and increased risk of certain cancers," McTiernan said. "The World Health Organization estimates that a quarter to a third of cancers could be prevented with maintenance of normal weight and keeping a physically active lifestyle."

The study was based on data from 439 overweight-to-obese, sedentary Seattle-area women, ages 50 to 75, who were randomly assigned to one of four groups: reduced-calorie diet only, exercise only (mainly brisk walking), reduced-calorie diet plus exercise and a control group that received no intervention. At the end of the yearlong study, participants on the diet-only and diet-plus-exercise arms lost an average of 10 percent of their starting weight, which was the goal of the intervention.

The analysis aimed to determine whether women with a history of moderate or severe weight cycling were at a disadvantage compared to non-weight-cyclers when it came to losing weight. Of the study participants overall, 18 percent (77 women) met the criteria for severe weight cycling (having reported losing 20 or more pounds on three or more occasions) and 24 percent (103 women) met the criteria for moderate weight cycling (having reported losing 10 or more pounds on three or more occasions).

Although severe weight cyclers were, on average, nearly 20 pounds heavier than non-cyclers at the start of the study, at the end of the study the researchers found no significant differences between those who yo-yo dieted and those who didn't with regard to the ability to successfully participate in diet and/or exercise programs. The cyclers also did not differ from the non-cyclers with regard to the impact of diet or diet-plus-exercise on weight loss, percentage of body fat and lean muscle mass gained or lost. Other physiological factors such as blood pressure, insulin sensitivity, and blood concentrations of hormones such as leptin (which helps make one feel full) and adiponectin (which helps regulate glucose levels) also did not differ significantly among those whose weight fluctuated and those whose did not.

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Study finds that yo-yo dieting does not thwart weight loss efforts or alter metabolism long term

IF YOU'RE a poor sleeper, and you can't seem to lose weight, the answer may be more obvious than you think.

While many people who don't get enough shut-eye berate themselves for their lack of control when it comes to food, in fact their insomnia could be to blame for those sneaky grams stacking on, says Dr Carmel Harrington.

Her new book The Sleep Diet: Why sleeping well is the missing link to permanent weight loss, has been getting plenty of airplay in the last week.

Maybe that's because it offers dieters the news they have been waiting for: that stubborn weight gain may not be all your fault.

"There is now conclusive proof of a link between lack of sleep, weight gain and obesity," writes Dr Harrington.

"It is now evident that if you don't take sleep seriously and do not get the sleep you need, you are more likely to put on weight, less likely to lose weight, more likely to develop Type 2 diabetes, more prone to depression and more likely to die younger than those people who do get a good night's sleep.

"So, far from being something we do when we have completed all other tasks, sleep should be at the forefront of our consideration as it is absolutely fundamental to our good health."

Part of the problem with not getting enough sleep, it seems, is that it throws our hormones and appetite out of whack.

Dr David Rapoport, associate professor and director of the Sleep Medicine Program at the New York University School of Medicine, says that while doctors have long known that many hormones are affected by sleep, it wasnt until recently that appetite entered the picture.

What brought it into focus, he says, was research on the hormones leptin and ghrelin.

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To sleep, perchance to diet

Houston, TX (PRWEB) August 10, 2012

After a new study was released this week showing that extra sleep can be an effective strategy for those looking to maintain a healthy weight, Henry The Health Hound announced a new promotion aimed at helping people avoid weight loss supplement scams and turn to healthy weights solutions. The health investigation website offers reviews and insight to the public about different health care scams on the market today and encourages people looking to lose weight to embrace healthy solutions to weight loss.

The company launched a new offer to help individuals looking to lose weight spot the many scam and pills advertised on the internet that could be dangerous to their health and instead turn to healthy and proven solutions like healthy diet, exercise and proper sleep patterns.

The health investigation site announced the new program aimed specifically at debunking the myths of weight loss supplements, after the new study was released. The health investigation site hopes that together with findings of this report about the healthy benefits of sleep when trying to lose weight, more individuals from around the country will avoid scam weight loss products that can waste their money and cause health issues. Henry The Health Hound hopes that with their new review and newsletter offers, more individuals looking to lose weight will embrace healthy habits like getting enough sleep instead of turning to scam weight loss products.

The new promotion, which features insider reviews and a free weight loss newsletter offer, has been launched on the company website and will feature information on the benefits of all natural weight loss solutions as it provides reviews on potentially dangerous weight loss products. The investigation site has launched the current promotion on their website and the new offer is currently available to any interested individual.

To find out more about the health investigation company and their weight loss product reviews, and healthy weight loss solutions, visit: http://www.healthhound.org/.

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Henry The Health Hound Announces New Promotion after Study Reveals Positive Relationship between Sleep and Weight Loss

Weight management program focuses on children

The rate of childhood obesity has more than tripled in the last 30 years.

For some children, nothing has worked. Their families deal with feelings of frustration and failure. Now a unique inpatient treatment program is offering an aggressive intervention.

At age 11, Staecy Gonzalez noticed that along with developing as every girl does, the pounds began to pile on.

She explained, "I kept looking at myself getting bigger and bigger and not fitting into my clothes, and the depression got really bad. Everything was just horrible. I was called a whole lot of names, you know. People were very cruel about it."

Anti-anxiety medication only made things worse.

She added, "I started gaining a lot of weight. I'm talking about 8 pounds a week. It was really bad."

Her doctor recommended HealthBridge Children's Hospital's Obesity Program, the only inpatient weight management program for kids in the state.

When Staecy checked in, the 15 year old was 5 feet 3 inches tall and 268 pounds.

Program Director Dr. Sharonda Taylor told Local 2, "Some of the levels of childhood overweight and obesity have leveled off, but cases of higher excess body weight continue to move forward, and not everyone's successful in the outpatient side."

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Weight management program offers help for kids

Editor's Choice Main Category: Nutrition / Diet Also Included In: Obesity / Weight Loss / Fitness Article Date: 10 Aug 2012 - 14:00 PDT

Current ratings for: Lose Weight While Still Consuming Sugar

James M. Rippe, M.D., one of the study authors, says:

The findings are important for people who try to lose weight and also for those who are concerned about the type of added sugars in foods and beverages they consume. The researchers decided to investigate sweeteners that are consumed in real-world diets at typical levels in American consumers.

Dr. Rippe explained: "We wanted to design a study that would generate information that is useful and applicable to the way people actually eat, not speculative results on simulated laboratory diets that focus on one component at extreme dietary levels."

The researchers conducted a randomized double blind trial that involved 247 overweight or obese people between the ages of 25 to 60 years. At the end of the 12-week reduced-calorie diet, the team saw no evidence that either table sugar or HFCS stopped people from losing weight when the overall amount of calories they consumed was reduced.

Dr. Rippe concludes:

Written by Petra Rattue Copyright: Medical News Today Not to be reproduced without permission of Medical News Today

MLA

n.p. "Lose Weight While Still Consuming Sugar." Medical News Today. MediLexicon, Intl., 10 Aug. 2012. Web. 10 Aug. 2012. <http://www.medicalnewstoday.com/articles/248911.php>

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Lose Weight While Still Consuming Sugar

SHREWSBURY, Mass., Aug. 9, 2012 /PRNewswire/ --A new study published in Nutrition Journal shows that people can lose weight while consuming typical amounts of sugar or high fructose corn syrup (HFCS) if their overall caloric intake is reduced.

"Our research debunks the vilification of high fructose corn syrup in the diet," said James M. Rippe, M.D., one of the study authors. "The results show that equally reduced-calorie diets caused similar weight loss regardless of the type or amount of added sugars. This lends further support to findings by our research group and others that table sugar and HFCS are metabolically equivalent."

The results are significant for those trying to lose weight and anyone concerned about the type of added sugars in foods and beverages they consume. Importantly, this study looks at sweeteners consumed in real-world diets and at levels that are typical among American consumers.

"We wanted to design a study that would generate information that is useful and applicable to the way people actually eat, not speculative results on simulated laboratory diets that focus on one component at extreme dietary levels," explained Dr. Rippe.

The study design included 247 overweight or obese subjects ages 25 to 60 who took part in the randomized, double blind trial. After 12 weeks on a hypocaloric (reduced calorie) diet, there was no evidence that either table sugar or HFCS prevented weight loss when the amount of overall calories was reduced.

"Misinformation about added sugars, particularly high fructose corn syrup, has caused many people to lose sight of the fact that there is no silver bullet when it comes to weight loss," said Dr. Rippe. "A reduction in calorie consumption, along with exercise and a balanced diet, is what's most important when it comes to weight loss."

Dr. Rippe is a cardiologist and graduate of Harvard College and Harvard Medical School. His research laboratory has conducted numerous studies and published widely in the areas of nutrition and weight management. He is an advisor to the food and beverage industry including the Corn Refiners Association, which funded this research with an unrestricted educational grant. He is the Founder and Director of the Rippe Lifestyle Institute, and Professor of Biomedical Sciences at the University of Central Florida.

Read more:
Looking to Lose Weight? New Study Shows Sugar and High Fructose Corn Syrup Perform Equally on a Reduced Calorie Diet

Public release date: 9-Aug-2012 [ | E-mail | Share ]

Contact: Carol Moreau cmoreau@rippelifestyle.com 508-756-1228 Fleishman-Hillard, Inc.

SHREWSBURY, MA A new study published in Nutrition Journal shows that people can lose weight while consuming typical amounts of sugar or high fructose corn syrup (HFCS) if their overall caloric intake is reduced.

"Our research debunks the vilification of high fructose corn syrup in the diet," said James M. Rippe, M.D., one of the study authors. "The results show that equally reduced-calorie diets caused similar weight loss regardless of the type or amount of added sugars. This lends further support to findings by our research group and others that table sugar and HFCS are metabolically equivalent."

The results are significant for those trying to lose weight and anyone concerned about the type of added sugars in foods and beverages they consume. Importantly, this study looks at sweeteners consumed in real-world diets and at levels that are typical among American consumers.

"We wanted to design a study that would generate information that is useful and applicable to the way people actually eat, not speculative results on simulated laboratory diets that focus on one component at extreme dietary levels," explained Dr. Rippe.

The study design included 247 overweight or obese subjects ages 25 to 60 who took part in the randomized, double blind trial. After 12 weeks on a hypocaloric (reduced calorie) diet, there was no evidence that either table sugar or HFCS prevented weight loss when the amount of overall calories was reduced.

"Misinformation about added sugars, particularly high fructose corn syrup, has caused many people to lose sight of the fact that there is no silver bullet when it comes to weight loss," said Dr. Rippe. "A reduction in calorie consumption, along with exercise and a balanced diet, is what's most important when it comes to weight loss."

###

Dr. Rippe is a cardiologist and graduate of Harvard College and Harvard Medical School. His research laboratory has conducted numerous studies and published widely in the areas of nutrition and weight management. He is an advisor to the food and beverage industry including the Corn Refiners Association, which funded this research with an unrestricted educational grant. He is the Founder and Director of the Rippe Lifestyle Institute, and Professor of Biomedical Sciences at the University of Central Florida.

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