Body mass index (BMI) is a value derived from the mass (weight) and height of a person. The BMI is defined as the body mass divided by the square of the body height, and is expressed in units of kg/m2, resulting from mass in kilograms (kg) and height in metres (m).
Obesity is a medical condition, sometimes considered a disease, in which excess body fat has accumulated to such an extent that it can potentially have negative affects on health. People are classified as obese when their body mass index (BMI)—a person's weight divided by the square of the person's height—is over 30 kg/m2; the range 25–30 kg/m2 is defined as overweight. Some East Asian countries use lower values to calculate obesity. Obesity is a major cause of disability and is correlated with various diseases and conditions, particularly cardiovascular diseases, type 2 diabetes, obstructive sleep apnea, certain types of cancer, and osteoarthritis.
Weight loss, in the context of medicine, health, or physical fitness, refers to a reduction of the total body mass, by a mean loss of fluid, body fat, or lean mass. Weight loss can either occur unintentionally because of malnourishment or an underlying disease, or from a conscious effort to improve an actual or perceived overweight or obese state. "Unexplained" weight loss that is not caused by reduction in calorific intake or increase in exercise is called cachexia and may be a symptom of a serious medical condition.
Human body weight is a person's mass or weight.
Bariatrics is the branch of medicine that deals with the causes, prevention, and treatment of obesity.
A fat camp, weight loss camp, or fat farm is a type of residential program where people who are overweight or obese go to attempt to lose weight through exercise and lifestyle changes.
Thomas Colin Campbell is an American biochemist who specializes in the effect of nutrition on long-term health. He is the Jacob Gould Schurman Professor Emeritus of Nutritional Biochemistry at Cornell University.
Kelly David Brownell is a clinical psychologist and scholar of public health and public policy at Duke University whose work focuses on obesity and food policy. He is a former dean of Duke's Sanford School of Public Policy. Noted for his research dealing primarily with obesity prevention, as well as the intersection of behavior, environment, and health with public policy, Brownell advised former First Lady Michelle Obama's initiatives to address childhood obesity and has testified before Congress. He is credited with coining the term "yo-yo dieting", and was named as one of "The World's 100 Most Influential People" by Time Magazine in 2006.
David Bradley Allison is an American obesity researcher, biostatistician, and psychologist. He is the dean of the Indiana University School of Public Health-Bloomington and one of the top 10 scientists in the world awarded the most NIH grants. Allison was previously Distinguished Professor, Quetelet Endowed Professor, and Director of the NIH-funded Nutrition Obesity Research Center at the University of Alabama at Birmingham (UAB).
George L. Blackburn was the S. Daniel Abraham Professor of Nutrition and associate director of the division of nutrition at Harvard Medical School. He was also director of the Center for the Study of Nutrition Medicine (CSNM) in the Roberta and Stephen R. Weiner Department of Surgery, and director of the new Feihe Nutrition Laboratory at Beth Israel Deaconess Medical Center (BIDMC), Boston, Massachusetts.
Judith A. Salerno, MD, MS is a physician executive and the President of the New York Academy of Medicine.
Being overweight or fat is having more body fat than is optimally healthy. Being overweight is especially common where food supplies are plentiful and lifestyles are sedentary.
Obesity in the United Kingdom is a significant contemporary health concern, with authorities stating that it is one of the leading preventable causes of death. In February 2016, former Health Secretary Jeremy Hunt described rising rates of childhood obesity as a "national emergency". The National Childhood Measurement Programme, which measures obesity prevalence among school-age pupils in reception class and year 6, found obesity levels rocketed in both years groups by more than 4 percentage points between 2019–20 and 2020–21, the highest rise since the programme began. Among reception-aged children, those aged four and five, the rates of obesity rose from 9.9% in 2019–20 to 14.4% in 2020–21. By the time they are aged 10 or 11, more than a quarter are obese. In just 12 months, the rate is up from 21% in 2019–20 to 25.5% in 2020–21.
A Matter of Fat is a 1969 documentary film produced by the National Film Board of Canada and directed by William Weintraub. It chronicles the efforts of a 358-pound man, Gilles Lorrain, to lose half his body weight as part of a hospital supervised weight loss program.
Robert H. Lustig is an American pediatric endocrinologist. He is Professor emeritus of Pediatrics in the Division of Endocrinology at the University of California, San Francisco (UCSF), where he specialized in neuroendocrinology and childhood obesity. He is also director of UCSF's WATCH program, and president and co-founder of the non-profit Institute for Responsible Nutrition.
Rudolph Leibel is the Christopher J. Murphy Professor of Diabetes Research, Professor of Pediatrics and Medicine at Columbia University Medical Center, and Director of the Division of Molecular Genetics in the Department of Pediatrics. He is also co-director of the Naomi Berrie Diabetes Center and executive director of the Russell and Angelica Berrie Program in Cellular Therapy, Co-director of the New York Obesity Research Center and the Columbia University Diabetes and Endocrinology Research Center.
This article summarizes healthcare in Texas. In 2022, the United Healthcare Foundation ranked Texas as the 38th healthiest state in the United States. Obesity, excessive drinking, maternal mortality, infant mortality, vaccinations, mental health, and limited access to healthcare are among the major public health issues facing Texas.
Shiriki K. Kumanyika is an Emeritus Professor of Biostatistics and Epidemiology at the Perelman School of Medicine at the University of Pennsylvania and co-chair of the International Association for the Study of Obesity International Obesity Task Force. She has previously served as Associate Dean for Disease Prevention and was founding director of the University of Pennsylvania Master of Public Health. She chairs the African American Collaborative Obesity Research Network. She is the former president of the American Public Health Association.
James O. Hill is an American obesity researcher who serves as director of the NIH-funded Nutrition Obesity Research Center in the University of Alabama at Birmingham. In 2022, he received a five-year, $10.8 million award as part of the Nutrition for Precision Health (NPH) study through the National Institutes of Health's All of Us Research Program. He served as chair of the Department of Nutrition Sciences in the UAB School of Health Professions from 2018 - 2022. Hill previously served on the faculty of the University of Colorado, where his positions included director of the Colorado Nutrition Obesity Research Center, director of the Center for Human Nutrition, and founding executive director of the Anschutz Health and Wellness Center. He was elected to the National Academy of Medicine in 2014, and has served as president of the American Society for Nutrition and the Obesity Society. He is the co-founder of America on the Move, a non-profit organization promoting lifestyle changes to counteract obesity and related health problems, and the National Weight Control Registry, a prospective study of long-term weight loss that was the largest of its kind as of 2018.
Fatima Cody Stanford is an American obesity medicine physician, internist, and pediatrician and an associate professor of medicine and pediatrics at Harvard Medical School. She is one of the most highly cited scientists in the field of obesity. She is recognized for shifting the global perception of obesity as a chronic disease.
