Weight Research Paper

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Body weight is most commonly measured in kilograms or pounds. Body mass index (BMI) is a frequently used measure and serves as an index of weight-for-height calculated in kg/m2. BMI is often used to stratify individuals into categories ranging from underweight to severely obese. One critique of BMI is that it does not distinguish between muscle and fat mass (Kraemer et al. 1990). Anthropomorphic measures (e.g., waist circumference) enhance measurement accuracy by examining distribution of excess weight around the abdominal region. Negative health consequences are associated with a waist circumference > 102 centimeters for men and > 88 centimeters for women (NIH 1998). Total body fat percentage is also used to measure excess weight and can be calculated by skin-fold caliper, hydrostatic weighing, or bioelectrical impedance testing.

Statistics compiled by the Centers for Disease Control and Prevention (CDC) indicate that in 2006 two-thirds of adults in the United States were overweight and 32.2 percent met the criteria for obesity. Moreover, obesity prevalence rates among children and adolescents have tripled since the mid-1980s (Ogden et al. 2003). Average BMI is increasing across demographic groups, and recent reports suggest that 45 percent of non-Hispanic black adults and 30 percent of non-Hispanic white adults are obese (CDC 2006). These trends are alarming because obesity is the second leading cause of preventable death and a risk factor for chronic illness, including type 2 diabetes, hypertension, and coronary heart disease.

Although the causes of obesity are not fully understood, it is viewed as a chronic disease influenced by genetic, environmental, behavioral, and cultural factors. Research suggests that genetic influences account for a significant amount of variability in BMI. Findings from twin studies suggest that up to 70 percent of variation in BMI can be accounted for by genetic factors, while adoption studies have produced more conservative heritability estimates of 20 to 30 percent (Bouchard 2002). However, genetic influences do not account for the dramatic and steady increase in the prevalence of obesity (Brownell 1994). Environmental factors, such as the widespread availability of calorie-dense foods and urban development not conducive to physical activity (e.g., lack of parks and busy intersections), also have contributed significantly to the rise in obesity.

Social Consequences Of Weight

A thin physique continues to be the accepted ideal in Western cultures despite a steady increase in the prevalence of overweight and obesity. Fashion models and popular cultural icons have become increasingly thin since the 1960s (Wolf 1991). Dissatisfaction with body weight has become the norm, especially for women (Rodin et al. 1985). In fact research suggests that 52 percent of men and 66 percent of women in the United States are dissatisfied with their weight (Garner 1997), and some women report dieting even when their weight is at or below normal (Rodin et al. 1985). However, there are racial differences on satisfaction with weight (Gluck and Geliebter 2002). Relative to white females, African American females report less concern about dieting and fatness (Rucker and Cash 1992). In addition, compared to overweight white females, overweight African American females are more satisfied with their bodies and feel more attractive (Stevens et al. 1994). While the overwhelming majority of women desire to lose weight, it is somewhat different for males. Although a substantial percentage (88%) of men who are dissatisfied with their weight do desire to lose weight, 22 percent of men who express dissatisfaction with their bodies actually wish to gain weight (Garner 1997). This is most likely due to the muscular ideals that are portrayed for male physiques (Drewnowski and Yee 1987; Frederick et al. 2005).

Weight-related stigmatization is prevalent in Western cultures, and data suggest that there has been an increase in weight bias since the mid-twentieth century (Latner and Stunkard 2003). Of the many conditions that are stigmatized in Western culture, it has been suggested that the stigma associated with being overweight may be the most debilitating and harmful (Sarlio-Lahteenkorva et al. 1995). Overweight individuals perceive stigmatization from co-workers, strangers, friends, and spouses (Friedman et al. 2005). Obesity also negatively affects employment (Rothblum et al. 1990) and socioeconomic status (Puhl and Brownell 2001). In addition data suggest that weight-based stigmatization negatively impacts the mental health of obese individuals (Friedman et al. 2005) and may contribute to overeating behaviors (Ashmore et al. 2007).

Weight And Mental Health

Studies examining obesity and mental health have yielded mixed results. Earlier studies reported no significant mental health differences between community samples of obese and healthy-weight individuals (Wadden and Stunkard 1985). More recently, data from the National Health and Nutrition Examination Survey revealed a 1.5fold higher risk for major depression among obese individuals relative to healthy-weight cohorts. Results suggested that severely obese individuals were at greatest risk for depression (Onyike et al. 2003). Several reviews suggest that the risk for major depression is particularly significant among the severely obese and those seeking surgical treatment for weight loss (see Wadden and Sarwer 2006), suggesting that extreme obesity is related to increased depression.

Treatment

Management of obesity is a major health-care challenge. There is a range of available treatments, including lifestyle modification, pharmacotherapy, and bariatric surgery. Typically, a step-care approach is taken with the least invasive intervention attempted first. Most treatments produce some initial weight loss; however, behavioral and pharmacological interventions have been largely unsuccessful in the long-term maintenance of weight loss among the severely obese (NIH 1998). Behavioral and pharmacological treatments for obesity typically result in a 5 to 15 percent weight reduction when successful, though patients often have higher weight-loss goals (Foster et al. 1997). According to the National Heart, Lung, and Blood Institute, surgical intervention is an option when BMI > 40 or > 35 in the presence of comorbid conditions (e.g., hypertension, diabetes). Follow-up studies of weight-loss surgery patients demonstrate 49 percent maintenance of excess weight loss over a fourteen-year period and resolution of many medical comorbidities(Pories 1995).

Bibliography:

  1. Bouchard, Claude. 2002. Genetic Influence on Body Weight. In Eating Disorders and Obesity: A Comprehensive Handbook, eds. Christopher G. Fairburn and Kelly D. Brownell, 16–21. New York: Guilford.
  2. Brownell, Kelly D. 1994. Get Slim with Higher Taxes. New York Times, December 15. Centers for Disease Control and Prevention (CDC): National Center for Health Statistics. National Health and Nutrition Examination Survey. http://www.cdc.gov/nchs/nhanes.htm.
  3. Drewnowski, Adam, and Doris K. Yee. 1987. Men and Body Image: Are Males Satisfied with Their Body Weight? Psychosomatic Medicine 49: 626–634.
  4. Foster, Gary D., Thomas A. Wadden, Renee A. Vogt, and Gail Brewer. 1997. What Is a Reasonable Weight Loss? Patients’ Expectations and Evaluations of Obesity Treatment Outcomes. Journal of Consulting and Clinical Psychology 65 (1): 79–85.
  5. Frederick, David A., Daniel M. T. Fessler, and Martie G. Haselton. 2005. Do Representations of Male Muscularity Differ in Men’s and Women’s Magazines? Body Image 2 (1): 81–86.
  6. Friedman, Kelli E., Simona K. Reichamn, Philip R. Costanzo, et al. 2005. Weight Stigmatization and Ideological Beliefs: Relation to Psychological Functioning in Obese Adults. Obesity Research 13 (5): 907–916.
  7. Garner, David M. 1997. The 1997 Body Image Survey Results. Psychology Today 30: 75–84.
  8. Gluck, Marci E., and Allan Geliebter. 2002. Racial/Ethnic Differences in Body Image and Eating Behaviors. Eating Behaviors 3 (2): 143–151.
  9. Kraemer, Helena C., Robert I. Berkowitz, and Lawrence D. Hammer. 1990. Methodological Difficulties in Studies of Obesity, I: Measurement Issues. Annals of Behavioral Medicine 12: 112–118.
  10. Latner, Janet D., and Albert J. Stunkard. 2003. Getting Worse: The Stigmatization of Obese Children. Obesity Research 11: 452–456.
  11. National Institutes of Health (NIH). 1998. Clinical Guidelines on the Identification, Evaluation, and Treatment of Overweight and Obesity in Adults: The Evidence Report. Obesity Research 6 (2): 51S–209S.
  12. Ogden, Cynthia L., Margaret D. Carroll, and Katherine M. Flegal. 2003. Epidemiologic Trends in Overweight and Obesity. Endocrinology and Metabolism Clinics of North America 32: 741–760.
  13. Onyike, Chiadi U., Rosa M. Crum, and B. Lee Hochang, et al. 2003. Is Obesity Associated with Major Depression? Results from the Third National Health and Nutrition Examination Study. American Journal of Epidemiology 158: 1139–1147.
  14. Pories, W. J. 1995. Who Would Have Thought? An Operation Proves to be the Most Effective Therapy for Adult-Onset Diabetes Mellitus. Annals of Surgery 222: 339–352.
  15. Puhl, Rebecca, and Kelly D. Brownell. 2001. Bias, Discrimination, and Obesity. Obesity Research 9: 788–805.
  16. Rodin, Judith, Lisa R. Silberstein, and Ruth Striegel-Moore. 1985. Women and Weight: A Normative Discontent. Psychology and Gender: Nebraska Symposium on Motivation 32: 267–307.
  17. Rothblum, Esther D., Pamela A. Brand, Carol T. Miller, and Helen A. Oetjen. 1990. The Relationship between Obesity, Employment Discrimination, and Employment-Related Victimization. Journal of Vocational Behavior 37: 251–266.
  18. Rucker, C. E, and T. F. Cash. 1992. Body Images, Body-Size Perception, and Eating Behaviors among African-American and White College Women. International Journal of Eating Disorders 12: 291–299.
  19. Sarlio-Lahteenkorva, Sirpa, A. Stunkard, and A. Rissanen. 1995. Psychosocial Factors and Quality of Life in Obesity. International Journal of Obesity 6: 1–5.
  20. Stevens, June, Shiriki K. Kumanyika, and Julian E. Keil. 1994. Attitudes toward Body Size and Dieting: Differences between Elderly Black and White Women. American Journal of Public Health 84: 1322–1325.
  21. Wadden, Thomas A., and David B. Sarwer. 2006. Behavioral Assessment of Candidates for Bariatric Surgery: A Patient-Oriented Approach. Obesity 14: 53S–62S.
  22. Wadden, Thomas A., and Albert J. Stunkard. 1985. Social and Psychological Consequences of Obesity. Annals of Internal Medicine 103: 1062–1067.
  23. Wolf, Naomi. 1991. The Beauty Myth: How Images of Beauty Are Used Against Women. New York: Morrow.

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