Weight Loss Blog

Today, more than 65 percent of adults in the United States are overweight or obese. Obesity puts people at increased risk for chronic diseases such as heart disease, type 2 diabetes, high blood pressure, stroke, and some forms of cancer.

The large number of people with obesity and the serious health risks that come with it make understanding its causes and treatment crucial. This fact sheet provides basic information about obesity: What is it? How is it measured? What causes it? What are the health risks? What can you do about it?

What is obesity?

“Obesity” specifically refers to an excessive amount of body fat. “Overweight” refers to an excessive amount of body weight that includes muscle, bone, fat, and water. As a rule, women have more body fat than men. Most health care professionals agree that men with more than 25 percent body fat and women with more than 30 percent body fat are obese. These numbers should not be confused with the body mass index (BMI), however, which is more commonly used by health care professionals to determine the effect of body weight on the risk for some diseases.

How is obesity measured?

Measuring the exact amount of a person’s body fat is not easy. The most accurate measures are to weigh a person underwater or in a chamber that uses air displacement to measure body volume, or to use an X-ray test called Dual Energy X-ray Absorptiometry, also known as DEXA. These methods are not practical for the average person, and are done only in research centers with special equipment.

There are simpler methods to estimate body fat. One is to measure the thickness of the layer of fat just under the skin in several parts of the body. Another involves sending a harmless amount of electricity through a person’s body. Results from these methods, however, can be inaccurate if done by an inexperienced person or on someone with extreme obesity.

Because measuring a person’s body fat is difficult, health care professionals often rely on other means to diagnose obesity. Weight-for-height tables, used for decades, have a range of acceptable weights for a person of a given height. One problem with these tables is that there are many versions, all with different weight ranges. Another problem is that they do not distinguish between excess fat and muscle. According to the tables, a very muscular person may be classified obese when he or she is not. The BMI is less likely to misidentify a person’s appropriate weight-for-height range.

Body Mass Index

The BMI is a tool used to assess overweight and obesity and monitor changes in body weight. Like the weight-for-height tables, BMI has its limitations because it does not measure body fat or muscle directly. It is calculated by dividing a person’s weight in pounds by height in inches squared and multiplied by 703.

Two people can have the same BMI but different body fat percentages. A bodybuilder with a large muscle mass and low percentage of body fat may have the same BMI as a person who has more body fat. However, a BMI of 30 or higher usually indicates excess body fat.

The BMI table below provides a useful guideline to check your BMI. First, find your weight on the bottom of the graph. Go straight up from that point until you come to the line that matches your height. A BMI of 25 to 29.9 indicates a person is overweight. A person with a BMI of 30 or higher is considered obese. Please review your findings with your health care provider if your BMI is outside of the normal range.

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Body Fat Distribution

Health care providers are concerned not only with how much fat a person has, but also where the fat is located on the body. Women typically collect fat in their hips and buttocks, giving them a “pear” shape. Men usually build up fat around their bellies, giving them more of an “apple” shape. Of course some men are pear-shaped and some women become apple-shaped, especially after menopause.

Excess abdominal fat is an important, independent risk factor for disease. Research has shown that waist circumference is directly associated with abdominal fat and can be used in the assessment of the risks associated with obesity or overweight. If you carry fat mainly around your waist, you are more likely to develop obesity-related health problems. Women with a waist measurement of more than 35 inches and men with a waist measurement of more than 40 inches may have more health risks than people with lower waist measurements because of their body fat distribution.

What causes obesity?

Obesity occurs when a person consumes more calories from food than he or she burns. Our bodies need calories to sustain life and be physically active, but to maintain weight we need to balance the energy we eat with the energy we use. When a person eats more calories than he or she burns, the energy balance is tipped toward weight gain and obesity. This imbalance between calories-in and calories-out may differ from one person to another. Genetic, environmental, and other factors may all play a part.

Genetic Factors

Obesity tends to run in families, suggesting a genetic cause. However, families also share diet and lifestyle habits that may contribute to obesity. Separating genetic from other influences on obesity is often difficult. Even so, science does show a link between obesity and heredity.

Environmental and Social Factors

Environment strongly influences obesity. Consider that most people in the United States alive today were also alive in 1980, when obesity rates were lower. Since this time, our genetic make-up has not changed, but our environment has.

Environment includes lifestyle behaviors such as what a person eats and his or her level of physical activity. Too often Americans eat out, consume large meals and high-fat foods, and put taste and convenience ahead of nutrition. Also, most people in the United States do not get enough physical activity.

Environment also includes the world around us—our access to places to walk and healthy foods, for example. Today, more people drive long distances to work instead of walking, live in neighborhoods without sidewalks, tend to eat out or get “take out” instead of cooking, or have vending machines with high-calorie, high-fat snacks at their workplace. Our environment often does not support healthy habits.

In addition, social factors including poverty and a lower level of education have been linked to obesity. One reason for this may be that high-calorie processed foods cost less and are easier to find and prepare than healthier foods, such as fresh vegetables and fruits. Other reasons may include inadequate access to safe recreation places or the cost of gym memberships, limiting opportunities for physical activity. However, the link between low socio-economic status and obesity has not been conclusively established, and recent research shows that obesity is also increasing among high-income groups.

Although you cannot change your genetic makeup, you can work on changing your eating habits, levels of physical activity, and other environmental factors. Try these ideas:

• Learn to choose sensible portions of nutritious meals that are lower in fat.
• Learn to recognize and control environmental cues (like inviting smells or a package of cookies on the counter) that make you want to eat when you are not hungry.
• Engage in at least 30 minutes of moderate-intensity physical activity (like brisk walking) on most, preferably all, days of the week.
• Take a walk instead of watching television.
• Eat meals and snacks at a table, not in front of the TV.
• Keep records of your food intake and physical activity.

Other Causes of Obesity

Some illnesses may lead to or are associated with weight gain or obesity. These include:

• Hypothyroidism, a condition in which the thyroid gland fails to produce enough thyroid hormone. It often results in lowered metabolic rate and loss of vigor.
• Cushing’s syndrome, a hormonal disorder caused by prolonged exposure of the body’s tissues to high levels of the hormone cortisol. Symptoms vary, but most people have upper body obesity, rounded face, increased fat around the neck, and thinning arms and legs.
• Polycystic ovary syndrome, a condition characterized by high levels of androgens (male hormone), irregular or missed menstrual cycles, and in some cases, multiple small cysts in the ovaries. Cysts are fluid-filled sacs.

A doctor can tell whether there are underlying medical conditions that are causing weight gain or making weight loss difficult.

Lack of sleep may also contribute to obesity. Recent studies suggest that people with sleep problems may gain weight over time. On the other hand, obesity may contribute to sleep problems due to medical conditions such as sleep apnea, where a person briefly stops breathing at multiple times during the night. You may wish to talk with your health care provider if you have difficulty sleeping.

Certain drugs such as steroids, some antidepressants, and some medications for psychiatric conditions or seizure disorders may cause weight gain. These drugs may slow the rate at which the body burns calories, stimulate appetite, or cause the body to hold on to extra water. Be sure your doctor knows all the medications you are taking (including over-the-counter medications and dietary supplements). He or she may recommend a different medication that has less effect on weight gain.

Obesity in America.

America is one of the richest, most progressive countries in the world. Shouldn’t it be one of the healthiest too? Maybe it should, but the sad truth is that Americans are some of the unhealthiest people in the world. Even though we are living in a country with great economic power and technological advancement, we are also living in a country with the smallest fund of practical nutritional knowledge. We are living in a land plagued with obesity.

America is home to the most obese people in the world. According to the CDC (Center for Disease Control and Prevention), obesity in adults has increased by 60% within the past twenty years and obesity in children has tripled in the past thirty years. A staggering 33% of American adults are obese and obesity-related deaths have climbed to more than 300,000 a year, second only to tobacco-related deaths. Not excluded from this statistic, Native Hawaiians have alarmingly high rates of obesity, diabetes and heart disease. The number of Hawaiian children suffering from obesity is double that of children throughout the nation. In May 2001 the University of Hawaii Kinesiology and Leisure Science Department along with the Brigham Young University Exercise and Sport Science Department conducted a local study and found that more than 20% of Hawaiian children were overweight.

Hawaiians aren’t the only indigenous people in America that have high rates of obesity. According to Dr. Kelly Brownell, PhD, an expert on American diet and health, a study was conducted with the Pima Indians who live both in Mexico and Arizona. It was found that those Pima Indians who live in Arizona have much higher rates of obesity than their counterparts in Mexico, even though both groups of people have the same genetic and ethnic background. This is also true for many migrants of the US who have a much higher obesity rate than their relatives back home.

So the question is, why the American people? What do we do that is so different than the rest of the world? There is no mystery behind this epidemic- we simply need to examine the American diet and lifestyle. Living a life on the go, eating fast-food and microwave dinners, the health of the American people has been sacrificed. Instead of eating a diet of pure, wholesome foods coming directly from the land, Americans eat a diet of packaged, processed, and refined foods.

Through technological advancement we have found ways to produce food in mass quantities, make it last longer and taste better. Unfortunately, during this processing somewhere along the line, we seemed to have lost the food. The highly processed and refined products that pack our supermarket shelves are loaded with sugar, hydrogenated oils, and plenty more ingredients that we can’t even pronounce.

Fast-food restaurants have become mainstream in the past 30 years and practically all of America takes advantage of the cheap prices, quick service and tasty meals. Convenient as they may be, these meals contain practically no nutrients. They are comprised mostly of saturated fats and highly refined carbohydrates and are loaded with sodium and sugar. The average adult shouldn’t have more than 65 grams of fat or 2000 calories a day. One meal from Burger King, a hamburger and French fries, has 50 grams of fat and 2000 calories, which is almost enough to fill someone’s fat and calorie quota for the day!

The average child sees more than 10,000 food ads on TV each year, most for high-calorie, high-fat, and high-sugar meals. Not only does the fast food industry spend billions per year on marketing, but they have also infiltrated our schools, signing contracts with them. Our children are bombarded from every angle with these toxic foods making it virtually impossible for them to eat anything else. It is no wonder that we have an increasingly obese population of children (who in time will become an obese population of adults).

Americans have re-defined the word food. In the Webster’s dictionary food is any nourishing substance eaten, drunk, or otherwise taken into the body to sustain life, provide energy, promote growth, etc. In American society food is that which is fatty, tasty, processed, refined and contains no nutrients; a substance detrimental to the body’s functions, creating disease, and resulting in death. At no time in history have humans eaten such refined, processed and fatty food and at no time in history have humans had such an obesity epidemic.

Since before anyone can remember, our ancestors, and our ancestors’ ancestors ate a diet coming directly from the land. In those days obesity wasn’t even a word. With modern technology, much has been gained, but some things have been lost. What was instinct for our ancestors must be taught to our children. Today, backwards as we may be in regards to our health, there is always hope.
Out of necessity, many obese people suffering from various complications and diseases have learned to change their diet. Those people, with determination and a will to survive, have succeeded in becoming healthy once again. They have learned that cutting out meat products, processed foods, fast-foods, high sugar and high sodium foods, while incorporating whole grains, vegetables, fruits and legumes into the diet is the only way to return back to health. It is not easy to go against the strong current of an unhealthy society but it is a necessity.

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