Questions and Answers
What is the key difference between being overweight and obese, as described by the National Heart, Lung, and Blood Institute?
Being overweight refers to having extra body weight contributed by bone, muscle, body fat, and/or body water, whereas obesity is a condition characterized by excessive and unhealthy amounts of body fat.
Why might a professional basketball player be considered overweight, despite not having excess body fat?
Because his muscular body build contributes to his extra body weight, not excess body fat.
What is the term used to describe people who have too much body fat but are not obese?
Overweight
What is the primary tool used to determine whether a person's weight is healthy, overweight, or obese?
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What percentage of American adults over the age of 20 were obese in 2017-2018, according to national survey data?
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By what percentage did the obesity rate increase between 1988-1994 and 2017-2018?
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Why is some body fat essential for good health?
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What is the term used to describe people who have too much body fat, combining both overweight and obese individuals?
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What percentage of adult Americans were classified as being extremely obese in 2017-2018?
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What is the BMI range for an adult to be classified as obese?
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What was the prevalence of overweight among adults in the United States in 2017-2018?
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What percentage of children aged 2 through 19 were obese in 2015-2016?
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What is the estimated number of adults worldwide who were overweight in 2016, according to the World Health Organization?
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What is the target goal for the percentage of adults who are obese by 2030, according to Healthy People 2030?
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What is the target goal for the percentage of children aged 2 through 19 who are obese by 2030, according to Healthy People 2030?
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What is the fundamental principle that applies to weight management, regardless of whether a person wants to maintain, lose, or gain weight?
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What is a potential consequence of concern about body size?
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What is the primary focus of this chapter in terms of weight management?
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Study Notes
The Obesity Epidemic
- Overweight and obesity are widespread nutritional problems in the United States, having reached epidemic proportions.
- Overweight refers to having extra body weight contributed by bone, muscle, body fat, and/or body water, whereas obesity is a condition characterized by excessive and unhealthy amounts of body fat.
Definition and Measurement
- Body Mass Index (BMI) is a numerical value that reflects body weight adjusted for height, used to determine healthy, overweight, or obese weight status.
- BMI categories: underweight (below 18.5), healthy (18.5-24.9), overweight (25.0-29.9), obese (30.0-39.9), and extremely obese (40 and above).
Prevalence of Overweight and Obesity
- In 2017-2018, over 42% of American adults over the age of 20 were obese, with an 85% increase since 1988-1994.
- Over 9% of adult Americans were classified as extremely obese in 2017-2018, a threefold increase since 1988-1994.
- Prevalence of overweight, obesity, and extreme obesity among adults: 2017-2018: 30.7%, 42.4%, and 9.2%, respectively.
Global Trend
- The prevalence of obesity among American children and adolescents has risen sharply over the past 25 years, with 18.5% of children aged 2-19 being obese in 2015-2016.
- Worldwide, 1.9 billion adults were overweight and 650 million adults were obese in 2016, according to the World Health Organization (WHO).
- Overweight and obesity are responsible for more deaths than underweight worldwide.
National Target Goals
- Healthy People 2030 aims to reduce the percentage of adults who are obese to 36% by 2030.
- The percentage of children aged 2-19 who are obese should decline to 15.5% by 2030.
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Description
Learn about the obesity epidemic, overweight and obesity definitions, and measurement using Body Mass Index (BMI).
