Food and Diet News and Weight Loss Plans
A few years ago, researchers at the National Institute of Health and Nutrition in Japan put rats through a series of swim tests with surprising results. They had one group of rodents paddle in a small pool for six hours, this long workout broken into two sessions of three hours each. A second group of rats were made to stroke furiously through short, intense bouts of swimming, while carrying ballast to increase their workload. After 20 seconds, the weighted rats were scooped out of the water and allowed to rest for 10 seconds, before being placed back in the pool for another 20 seconds of exertion. The scientists had the rats repeat these brief, strenuous swims 14 times, for a total of about four-and-a-half minutes of swimming. Afterward, the researchers tested each rat’s muscle fibers and found that, as expected, the rats that had gone for the six-hour swim showed preliminary molecular changes that would increase endurance. But the second rodent group, which exercised for less than five minutes also showed the same molecular changes.
The potency of interval training is nothing new. Many athletes have been straining through interval sessions once or twice a week along with their regular workout for years. But what researchers have been looking at recently is whether humans, like that second group of rats, can increase endurance with only a few minutes of strenuous exercise, instead of hours? Could it be that most of us are spending more time than we need to trying to get fit?
The answer, a growing number of these sports scientists believe, may be yes.
“There was a time when the scientific literature suggested that the only way to achieve endurance was through endurance-type activities,” such as long runs or bike rides or, perhaps, six-hour swims, says Martin Gibala, PhD, chairman of the Department of Kinesiology at McMaster University in Ontario, Canada. But ongoing research from Gibala’s lab is turning that idea on its head. In one of the group’s recent studies, Gibala and his colleagues had a group of college students, who were healthy but not athletes, ride a stationary bike at a sustainable pace for between 90 and 120 minutes. Another set of students grunted through a series of short, strenuous intervals: 20 to 30 seconds of cycling at the highest intensity the riders could stand. After resting for four minutes, the students pedaled hard again for another 20 to 30 seconds, repeating the cycle four to six times (depending on how much each person could stand), “for a total of two to three minutes of very intense exercise per training session,” Gibala says.
Each of the two groups exercised three times a week. After two weeks, both groups showed almost identical increases in their endurance (as measured in a stationary bicycle time trial), even though the one group had exercised for six to nine minutes per week, and the other about five hours. Additionally, molecular changes that signal increased fitness were evident equally in both groups. “The number and size of the mitochondria within the muscles” of the students had increased significantly, Gibala says, a change that, before this work, had been associated almost exclusively with prolonged endurance training. Since mitochondria enable muscle cells to use oxygen to create energy, “changes in the volume of the mitochondria can have a big impact on endurance performance.” In other words, six minutes or so a week of hard exercise (plus the time spent warming up, cooling down, and resting between the bouts of intense work) had proven to be as good as multiple hours of working out for achieving fitness. The short, intense workouts aided in weight loss, too, although Gibala hadn’t been studying that effect. “The rate of energy expenditure remains higher longer into recovery” after brief, high-intensity exercise than after longer, easier workouts, Gibala says. Other researchers have found that similar, intense, brief sessions of exercise improve cardiac health, even among people with heart disease.
There’s a catch, though. Those six minutes, if they’re to be effective, must hurt. “We describe it as an ‘all-out’ effort,” Gibala says. You’ll be straying “well out of your comfort zone.” That level of discomfort makes some activities better-suited to intense training than others. “We haven’t studied runners,” Gibala says. The pounding involved in repeated sprinting could lead to injuries, depending on a runner’s experience and stride mechanics. But cycling and swimming work well. “I’m a terrible swimmer,” Gibala says, “so every session for me is intense, just because my technique is so awful.”
Meanwhile, his lab is studying whether people could telescope their workouts into even less time. Could a single, two- to three-minute bout of intense exercise confer the same endurance and health benefits as those six minutes of multiple intervals? Gibala is hopeful. “I’m 41, with two young children,” he says. “I don’t have time to go out and exercise for hours.” The results should be available this fall.
Dieting is the practice of ingesting food in a regulated fashion to achieve or maintain a controlled weight. In most cases the goal is weight loss in those who are overweight or obese, but some athletes aspire to gain weight (usually in the form of muscle) and diets can also be used to maintain a stable body weight.
Diets to promote weight loss are generally divided into four categories: low-fat, low-carbohydrate, low-calorie, and very low calorie.[1] A meta-analysis of six randomized controlled trials found no difference between the main diet types (low calorie, low carbohydrate, and low fat), with a 2–4 kilogram weight loss in all studies.[1] At two years all diet types cause equal weight loss irrespective of the macronutrients emphasized.[2]
There are several kinds of diets:
Receiving adequate nutrition through a well-balanced diet is crucial during childhood and adolescence. Some diets can deprive the body of necessary nutrients, for instance lipids. In addition, there are some indications that the harmful effects of starvation or extreme dieting during adolescence exceed the expected benefits, sometimes even leading to increased weight gains.[4]
Research shows that putting children on starvation or extreme diets can be harmful. The brain is unable to learn how to correlate taste with nutritional value, which is why such children may consistently overeat later in their life despite adequate nutritional intake. [5]
As endotherms, humans expend energy to maintain their blood temperature at body temperature, which is approximately 37 °C (98.6 °F). This is accomplished by metabolism and blood circulation, by shivering to stay warm, and by sweating to stay cool.[6]
In addition to thermoregulation, humans expend energy keeping the vital organs (especially the lungs, heart and brain) functioning. Except when sleeping, our skeletal muscles are working, typically to maintain upright posture. The average work done just to stay alive is the basal metabolic rate.
Physical exercise is an important complement to dieting in securing weight loss. Aerobic exercise is also an important part of maintaining normal good health, especially the muscular strength of the heart.
Though the energy for muscle activity is primarily derived from the glycogen stored in the body, continued activity results in an increased use of the fatty acids as well. After the available glycogen stores are exhausted, fatty acids alone are used [7]. It is often recommended that muscle activity be maintained for 20 minutes or more for increased usage of fatty acids.
The energy burnt during physical exercise has only a limited effect on weight loss, since an hour of aerobic exercise for a man in reasonable physical shape would burn about 2 megajoules (500 kilocalories), which is equivalent to only 60 grams (2 oz) of fat.
Both aerobic and anaerobic exercise would increase the basal metabolic rate (BMR) for some time after exercising. This leads to an additional caloric loss.
Weight loss typically involves the loss of fat, water and muscle. Overweight people, or people suffering from obesity, typically aim to reduce the percentage of body fat. Additionally, as muscle tissue is denser than fat, fat loss results in increased loss of body volume compared with muscle loss. Reducing even 10% body fat can therefore have a dramatic effect on a person’s body shape. To determine the proportion of weight loss that is due to decreased fat tissue, various methods of measuring body fat percentage have been developed.
Muscle loss during weight loss can be restricted by regularly lifting weights (or doing push-ups and other strength-oriented calisthenics) and by maintaining sufficient protein intake. Those on low-carbohydrate diets, and those doing particularly strenuous exercise, may wish to increase their protein intake. According to the National Academy of Sciences, the Dietary Reference Intake for protein is “0.8 grams per kilogram of body weight for adults.”
Excessive protein intake, may cause liver and kidney problems and may be a risk factor for heart disease.[8]. There is no conclusive evidence that moderately high protein diets in healthy individuals are dangerous, it has only been shown that these diets are dangerous in individuals who already have kidney and liver problems.
The energy intake from food is limited by the efficiency of digestion and the efficiency of utilization. The efficiency of digestion is largely dependent on the type of food being eaten, while efficiency of utilization is affected by individual factors, including body weight and hormones.
The effects of chewing, especially in elderly people, have been shown to affect the intake of micronutrients. However, there was no significant effect on the intake of macronutrients, such as sugars, fats, and proteins[9].
Food provides nutrients from six broad classes: proteins, fats, carbohydrates, vitamins, dietary minerals, and water. Carbohydrates are metabolized to provide energy. Proteins provide amino acids, which are required for cell construction, especially for the construction of muscle cells. Essential fatty acids are required for brain and cell membrane construction. Vitamins and trace minerals help maintain proper electrolyte balance and are required for many metabolic processes. Dietary fiber is another food component which influences health even though it is not actually absorbed into the body.
Any diet that fails to meet minimum nutritional requirements can threaten general health (and physical fitness in particular). If a person is not well enough to be active, weight loss and good quality of life will be unlikely.
The National Academy of Sciences and the World Health Organization publish guidelines for dietary intakes of all known essential nutrients.
Sometimes dieters will ingest excessive amounts of vitamin and mineral supplements. While this is usually harmless, some nutrients are dangerous. Men (and women who don’t menstruate) need to be wary of iron poisoning. Retinol (oil-soluble vitamin A) is toxic in large doses. As a general rule, most people can get the nutrition they need from foods. In any event, a multivitamin taken once a day will suffice for the majority of the population.
Weight-loss diets which manipulate the proportion of macronutrients (low-fat, low-carbohydrate, etc.) have not been found to be more effective than diets which maintain a typical mix of foods with smaller portions and perhaps some substitutions (e.g. low-fat milk, or less salad dressing).[10] Extreme diets may, in some cases, lead to malnutrition.
All body processes require energy to run properly. When the body is expending more energy than it is taking in (e.g. when exercising), the body’s cells rely on internally stored energy sources, like complex carbohydrates and fats, for energy. The first source the body turns to is glycogen (by glycogenolysis). Glycogen is a complex carbohydrate, where 65% of it is stored in skeletal muscles and the rest in the liver (totaling about 2000 kcal in the whole body). It is created from the excess of ingested macronutrients, mainly carbohydrates. When those sources are nearly depleted, the body begins lipolysis, the mobilization and catabolism of fat stores for energy. In this process, fats, obtained from adipose tissue, or fat cells, are broken down into glycerol and fatty acids, which can be used to make energy. The primary by-products of metabolism are carbon dioxide and water; carbon dioxide is expelled through the respiratory system.
Fats are also secreted by the sebaceous glands (in the skin).
Diets affect the “energy in” component of the energy balance by limiting or altering the distribution of foods. Techniques that affect the appetite can limit energy intake by affecting the desire to overeat.
Cognitive Behavior Therapy has been effective in producing long term weight loss [11]. Judith S. Beck has been one of the most prominent practitioners and writers to bring this method to a popular audience.
Consumption of low-energy, fiber-rich foods, such as non-starchy vegetables, is effective in obtaining satiation (the feeling of “fullness”). Exercise is also useful in controlling appetite as is drinking water and sleeping.
The use of drugs to control appetite is also common. Stimulants are often taken as a means to suppress hunger in people who are dieting. Ephedrine (through facilitating the release of adrenaline and noradrenaline) stimulates the alpha(1)-adrenoreceptor subtype, which is known to act as an anorectic. L-Phenylalanine, an amino acid found in whey protein powders also has the ability to suppress appetite by increasing the hormone cholecystokinin (CCK) which sends a satiety signal to the brain.
There exist both profit-oriented and non-profit weight loss organizations who assist people in their weight loss efforts. An example of the former is Weight Watchers; examples of the latter include Overeaters Anonymous, as well as a multitude of non-branded support groups run by local churches, hospitals, and like-minded individuals.
These organizations’ customs and practices differ widely. Some groups are modelled on twelve-step programs, while others are quite informal. Some groups advocate certain prepared foods or special menus, while others train dieters to make healthy choices from restaurant menus and while grocery-shopping and cooking.
Most groups leverage the power of group meetings to provide counseling, emotional support, problem-solving, and useful information.
A July 2008 study, published in the American Journal of Preventive Medicine, showed dieters who keep a daily food diary (or diet journal) of what they eat lose twice as much weight as those who do not. The researchers concluded, “It seems that the simple act of writing down what you eat encourages people to consume fewer calories.”[12] Diet journaling software and websites have become popular to help people track calorie consumption, calorie burning, weight loss goals, and nutritional balance.
Obesity is the second leading cause of preventable death in the U.S. [1]
Want to slim down fast for that beach vacation or high school reunion? While there are many things you can do to shed pounds, losing weight too quickly, like any sudden change to your body, can be dangerous. While fad diets, diet pills, and fasting may indeed induce rapid weight loss, these methods can cause you to lose muscle and may also injure your heart and other organs fairly quickly. The best solution? Don’t go for an overnight miracle. Instead, follow these steps to lose fat rapidly, healthily, and sustainably.
Levi and Bristol at the Republican convention in September. (Paul Sancya/AP)
Bristol Palin gave birth to her much-anticipated baby son on Sunday, People.com reported this evening.
The first grandchild of Alaska Gov. Sarah Palin is Tripp Easton Mitchell Johnston, weighing in at seven pounds, four ounces.
When it was announced shortly after Gov. Palin was named John McCain’s running mate that her teenage daughter was expecting, it triggered national debates on teen pregnancy and marriage, abstinence education, the VP vetting process, the privacy of political families and, well, just about everything.
Bristol Palin is 18, as is her boyfriend of three years, Levi Johnston, a former high school hockey player. Both have dropped out of high school — she to complete her diploma through correspondence courses, People reports, and he to become an apprentice electrician, he told the AP this fall. They have said they plan to marry in 2009. (Johnston’s mother Sherry was arrested earlier this month on felony drug charges for allegedly selling OxyContin.)
Colleen Jones, who is the governor’s aunt, confirmed the news of the baby’s birth to People. “We think it’s wonderful,” she said. “The baby is fine and Bristol is doing well. Everyone is excited.”
So what is your New Year Resolution? To lose weight and get the shape you desire fast and keep to your plans to achieve your desired weight goal
successfully lose weight takes time, and you need to take the time to do it or you will become frustrated. Be patient.
Most of us find ourselves facing each New Year with the same 10 pound resolution or whatever our personal number is. Fad diets have failed us, many have tried and lost weight using the larger weight loss programs, such as Weight Watchers and Jenny Craig or Nutri Systems. I have friends who are in FA, (Food Addicts Anonymous). On thing has remained the same in my life, most of the people I know gain at least part of the weight back.
Right now Oprah Winfrey just announced that she has gained much of her weight back.
After years of dieting and having her own people, like her chef Rosie, ( I have this book, and the recipes are very good!)
Even Oprah, with all that money and resources has gained back part of her weight and struggles to keep it off. She even has her own trainer!
The problem or I should say challenge with losing weight and keeping it off, is you literally have to change what you do and that involves changing habits. One of the hardest things for us humans to do.
So lets start with just some basic ideas to help change a few of your habits in the New Year.
You can start your treadmill, or exercise bike, or just walking around your neighborhood.
These are easy and frugal ways to start changing habits and patterns you may have developed over the years.
A few ideas to jump start your New Year weight loss program are things like:
You can nurture your friendship and start your journey to fitness at the same time. Just remember, we did not get this extra weight overnight, and we will not lose it overnight either.
A few more behavioral tips to help you are:
1. Put down your fork between bites.
2. Drink a glass of water before you start eating.
(did you know that many times when you feel hungry, your body is actually telling you that it needs
some water?)
3. Eat half your meal, stop, and save the rest for later. ( I do this with large meals and I am amazed how mentally it helps me, and also saves me calories, since I usually only eat the 2nd half later rather then an entire new meal)
4. Eat slower, let your food "hit bottom"
5. Do NOT eat in front of the TV or computer. (this is really hard for me!)
Make your meal a time of peace and quiet and focus on your food. Many of us eat without thought.
We eat to feel better and distract ourself from our feelings.
6. Keep a food journal, ( another thing I always start but never stick too!)
Studies have proven people who wrote everything down, ate less and had better success at changing
their eating habits. I have been using fitday for years , it is free and I can look back at the last 7 New Years and see the same 10 pound resolution I have made all this time in my online journal there.
Hang in there, stay positive and remember, you only have one life and you can change and make it what it you want to be. Just start small, and keep building up positive actions, one small thing at a time. Try to make just a few changes, and pat yourself on the back as you make them.
Be proud of yourself for each step you make towards change. Change is hard and a lifetime of habits takes time to undo. It seems women especially are so hard on themselves. Please start your day off with some positive affirmations about yourself and what you want out of the day. This can change your whole day. Take that time for yourself, you need it. Best of luck and Happy New Year!
More child deaths linked to China’s melamine
The death toll in the melamine scandal may be higher than China’s government suggests based on a recent revelation that at least five more children died after drinking infant formula tainted with the industrial chemical.
One of the deaths that may be linked to the scandal occurred in Liti village in Henan province in central China’s wheat and corn flatlands.
Farmer Li Xiaoquan and his wife were the parents of baby twin girls, but tragedy struck just before dawn on Sept. 10 when one of the nine-month-old infants died of kidney failure.
The previous month, an ultrasound examination of baby Xiaokai’s kidneys at the Zhengzhou Children’s Hospital had found a stone in each kidney that was about the size of a small marble and two and a half times larger than what doctors consider a critical threshold.
Li’s family and doctors have never been able to confirm how she got sick.
But just a day after Xiaokai died, state media reported that the type of formula milk the infant used to drink had been tainted with melamine.
Xiaokai, older than her twin, Xiaoyan, by three minutes, was fed formula milk while the younger girl nursed on breast milk because their mother did not have enough for both, family members said.
Li said he first learned of the contamination scandal from a relative who watched the news on television.
Although the cause of his daughter’s death has not been confirmed, the grieving father puts the blame on the baby formula, which was produced by state-owned Sanlu, the diary at the centre of the contaminated milk scandal.
China’s Health Ministry said three infants died from drinking melamine-tainted milk and up to 50,000 were made ill.
Yet the deaths of Xiaokai and at least four other babies reported by the Associated Press have not been included in China’s official death toll, suggesting that the tainted milk scandal may have exacted a higher human toll than the government has acknowledged.
Nobody is suggesting large numbers of deaths are being concealed, but so many months passed before the scandal was exposed that it is likely that more babies fell sick or died than official figures reflect.
The families of the uncounted victims of the scandal fear that the lack of an official verdict on their children's deaths means they will be unable to bring lawsuits and claim compensation.
Even though he is determined to sue for compensation from either the government or Sanlu, Li accepts that the chance of winning is "slim."
But that chance received a small boost last week when lawyers for dozens of families whose children were sickened by tainted milk decided to launch a class-action lawsuit against Sanlu, hoping to pressure Chinese authorities still dithering over compensation.
After weeks of discussions, the 15 lawyers decided to bundle cases involving nearly 100 families into a single lawsuit seeking medical and other expenses, payments for trauma and compensation for the families of those who died.
Since the melamine scandal was first reported in September, Beijing has confirmed that the Shijiazhuang Sanlu Group knew as early as last year that its products were tainted with the chemical and that company and local officials first tried to cover it up.
The government has promised free medical treatment to the children made ill and unspecified compensation to them and families of the dead.
But the Health Ministry, which is co-ordinating the government's response, so far declined to answer questions about the compensation plan and whether it was investigating deaths and illnesses not yet counted by the government.
Back in Liti Village, Li and his wife struggle to come to terms with the loss of their baby daughter — their grief compounded by the fact that they do not know where the infant is buried.
In some parts of China, the death of a child is considered a misfortune that can bring bad luck on a family and is best suppressed.
After her death, Li handed Xiaokai's body to his cousin and three other villagers.
They took her to the far side of the village fields and put her in a shallow grave under a path between rows of poplar trees.
No close family members were there and apart from the four men, no one knows where the baby girl is buried.
China Food Fears Go From Pets To People
By Ariana Eunjung Cha
Washington Post Foreign Service
Wednesday, April 25, 2007; Page A01
SHANGHAI — Something was wrong with the babies. The villagers noticed their heads were growing abnormally large while the rest of their bodies were skin and bones. By the time Chinese authorities discovered the culprit — severe malnutrition from fake milk powder — 13 had died.
The scandal, which unfolded three years ago after hundreds of babies fell ill in an eastern Chinese province, became the defining symbol of a broad problem in China’s economy. Quality control and product-safety regulation are so poor in this country that people cannot trust the goods on store shelves.
In China, more than 200 million farmers grow a variety of crops on plots of one to two acres, earning less than $200 a year.
In China, more than 200 million farmers grow a variety of crops on plots of one to two acres, earning less than $200 a year. (By Eugene Hoshiko — Associated Press)
Until now, the problem has not received much attention outside of China. In recent weeks, however, consumers everywhere have been learning about China’s safety crisis. Tainted ingredients that originated here made their way into pet food that has sickened and killed animals around the world.
Chinese authorities acknowledge the safety problem and have promised repeatedly to fix it, but the disasters keep coming. Tang Yanli, 45, grand-aunt of a baby who became sick because of the fake milk but eventually recovered, said that even though she now pays more to buy national brands, she remains suspicious.
“I don’t trust the food I eat,” she said. “I don’t know which products are good, which are bad.”
read the rest of this article here:
Melamine Contamination in China
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