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Nutrition and Health - weight loss programs and diet central
The most important feature of a successful dieting program is maintenance of stable weight or of reduced weight. In formal programs, continued regular contact with a supervising professional may be necessary to maintain weight loss. In any case, new eating behaviors must be learned and adopted, which can be difficult. These behaviors include modifying quantity and kinds of food, and possibly developing a different attitude toward eating and toward oneself. Therefore, an individual weight loss diet method should be based not merely on weight loss goals but should become part of a general long-term approach, the goal of which is better nutrition and health. This goal should reflect accepted guidelines for healthful eating. Even though a caloric deficit must be achieved, the healthy diet must provide all essential nutrients. A regular exercise regimen, which could be as simple as walking, is essential both to better health as well as long-term dieting maintenance.
Methods whose primary goal is short-term rapid or unsupervised weight loss, or that rely on diet aids such as diet drinks, prepackaged diet foods, or pharmacologic agents but do not include education in and eventual transition to a lasting pattern of healthful eating and activity, have never been shown to lead to long-term success. It has been fairly said that such programs fail people, not vice versa. Recognition of this by society and individuals and a focus on approaches that can produce health benefits independently of weight loss may be the best way to improve the physical and psychological health of Americans seeking to lose weight.
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Our weight loss program is unlike any other. We provide a wide selection of prepared diet foods designed to keep our clients on track toward their weight loss goal. In addition to providing delicious diet foods, our website gives our clients information and services designed to provide the answers they desire and the support they require. nutrisystem.com - Lose the weight - Now!
Nutrisystem History
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see part one of this article here
Evidence suggests that the causes of overweight and obesity are multifactorial. Thus, an appropriate research base must span the entire spectrum of health research from genetic, biochemical, physiologic, and neurophysiologic to individual, community, and population investigations. Research is needed within and across these areas; the biomedical perspective should be incorporated into clinical trials and population studies.
Obesity in humans has a substantial genetic basis. Numerous animal models of obesity are attributable to defects in as yet unidentified genes. Molecular genetic technology now makes identifying such genes possible in both animals and humans. Characterization of the function of the gene products should facilitate understanding of the biochemical, physiologic, and neural basis for regulation of body weight and body fat, the resting metabolic rate, and metabolic efficiency. Interactions between genetic makeup and environment or environment alone during early childhood may influence the development of obesity. Understanding basic mechanisms elucidated by gene analysis also may provide important new insights into environmentally induced weight gain.
Physiologic research is helping define weight loss mechanisms that may be useful in therapy. Mechanisms identified include suppressing appetite, inhibiting gastric emptying, blocking carbohydrate or lipid digestion, stimulating lipid oxidation, and increasing thermogenesis. These mechanisms should be explored with pharmacotherapeutic research. Further efforts should be made to identify other mechanisms. Elucidating the physiologic basis for body fat distribution is important because of its relation to health.
The paucity of well-designed, long-term clinical trials evaluating various methods for voluntary weight loss is disturbing. Particularly lacking are data on minority populations and persons who are mildly to moderately overweight. Long-term clinical trials will provide the most convincing evidence about the longer term health effects of weight loss. Methods to improve compliance with weight loss regimens and methods for long-term maintenance of weight control should receive investigative priority. More must be known about the relationship of binge-eating, dieting, and weight loss. Commercial weight loss programs should routinely compile data on participant characteristics, attrition rates, degree and duration of weight loss, and adverse effects for all participants.
Because several observational studies found weight loss was associated with increased mortality, further analysis of existing data sets and survival studies of persons losing weight voluntarily are urgently needed. Better studies are needed to clarify long-term psychological effects of voluntary weight loss. Physical and psychological outcomes of weight cycling deserve additional investigation.
Population studies are needed to determine better the range of healthy weights by age, gender, and ethnicity. The effects of obesity in childhood, obesity treatment and prevention in children, and long-term consequences of childhood obesity are important research priorities.
Research on the prevention of obesity and unhealthy weight gain is an area of critical need. Of special importance are prevention of unhealthy weight gain in certain minority populations and prevention of unhealthy dieting among adolescent women. Weight and voluntary weight loss practices are closely tied to cultural and societal attitudes toward weight and body image. Interdisciplinary research involving all types of behavioral scientists is necessary to develop and evaluate prevention programs that encourage Americans to adopt healthy eating habits and lifestyles that will affect lifelong control of weight. Methods must be developed to deal effectively with such problems as an unrealistically thin ideal among some women and an uncritical acceptance of dangerous overweight in certain cultures.
Successful weight loss programs improve control of noninsulin-dependent diabetes mellitus and hypertension, reduces cardiovascular risk factors, and enhances self-image. Long-term health effects are much less clear. Several epidemiologic studies raise the possibility that weight loss is associated with increased mortality. The relevance of these findings to voluntary weight loss programs is not yet clear.
Survey evidence also confirms that many Americans who are not overweight, particularly young women, are trying different diet plans to lose weight. This practice may have significant adverse physical and psychological health consequences.
Because of the importance of these issues, research on the biologic and social influences on weight and weight control and the health consequences of weight loss and dieting should assume a high priority on the nation's health agenda.
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