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The purpose of this study is to test two versions a weight loss program potentially suitable for implementation in Africa. A successful method would have widespread application in low-income countries, with the potential to improve world health.
The purpose of this study is to determine whether robotic assistance can help facilitate adherence, engagement, and weight loss in participants enrolled in a behavioral weight loss program. All participants will be enrolled in the same Web-based weight loss program and take part in "robotic assistance sessions" either early or late in the five-week study. These robotic assistance sessions involve speaking one on one with a robot about diet-related progress.
Resistant starch (RS) is a type of fiber that has unique digestive properties that can impact overall health including glucose homeostasis and satiety. RS found in potatoes can be increased by using certain cooking methods and serving temperatures. The purpose of this trial will compare the acute glycemic and satiety responses after consuming potatoes differing in RS content that are 1) baked then chilled or 2) boiled and consumed hot in overweight females on two separate occasions.
The main purpose of this study is to compare the impact of aerobic interval training intensity on exercise adherence and changes in cardiorespiratory fitness, cardiometabolic risk profile, body composition, inflammatory markers and subjective health outcomes after a 12-week intervention trial in overweight individuals at increased cardiometabolic risk.
The main purpose of this study is to compare the effects of whole-body electromyostimulation versus a conventional low-volume strength-training program, each combined with an individualized, weight-reducing diet, on the cardiometabolic risk profile, muscle strength, body composition, inflammatory markers and subjective health outcomes in overweight individuals at increased cardiometabolic risk.
The goals of the proposed study are to test the usability, feasibility and preliminary efficacy of the E-Scale with wheelchair users. The E-scale was developed as a weight monitoring technology for wheelchair users. Up to fifteen overweight or obese wheelchair users will be enrolled in a 13 week study that includes standard behavioral treatment (SBT) for weight loss, which focuses on diet, physical activity, and behavioral strategies (e.g., goal setting, self-monitoring) to support lifestyle changes specifically for people with mobility impairments. The subjects will also be provided the E-scale to track their weight daily. The outcome measure include usefulness (subjective feedback from a survey about the program/E-scale), feasibility (accuracy and repeatable measurements from the E-scale) and efficacy (improvements in weight and other measures of health) of the weight loss program coupled with the E-scale at the end of 13 weeks. The primary hypothesis is that the E-scale coupled with the weight loss intervention will result in significant improvements in weight, abdominal girth, body fat percentage, and the Center for Epidemiologic Studies Depression Scale (CES-D).The results may inform the refinement of this technology to increase its applicability for wheelchair users to independently monitor their weight in their own homes while attempting to lose weight.
Although research indicates foreign-born Mexican-Americans possess a healthy weight advantage relative to U.S.-born Mexican-Americans, patterns are less clear for children and may be changing over time. The objective of this study was to examine whether the relationship between nativity and overweight/obesity has changed over time among Mexican-American children and to investigate the implications of this pattern on overweight/obesity disparities relative to non-Hispanic Whites. Using cross-sectional data from Mexican-Americans and non-Hispanic white children ages 4-17 years participating in the National Health and Nutrition Examination Surveys (1988-1994 (N=4,718) and 2005-2014 (N=7,269), the investigators used log-binomial regression to calculate prevalence ratios (PR) of overweight/obesity by nativity status adjusting for age, sex, householder marital status, householder education, survey period and a nativity by survey period interaction. The investigators also tested another covariate-adjusted model with a 3-level ethnicity-nativity variable that included Whites and an ethnicity-nativity by survey period interaction.
The purpose of this study is to test the interactions between the genes and diet interventions varying in macronutrient intake on glycemic, waist circumference, body weight, visceral fat and lipids changes. In the POUNDS LOST, all of the 811 participants DNA was extracted from the buffy coat fraction of centrifuged blood using the QIAmp blood kit (Qiagen, Chatsworth, CA). Single nucleotide polymorphisms were genotyped using the OpenArray™ SNP genotyping system (BioTrove, Woburn, MA). The study is only accepting participants in the Boston, Massachusetts or Baton Rouge, Louisiana area. For further enrollment information in Boston or Baton Rouge, see Eligibility Criteria or Design Narrative. Besides, the investigators integrated novel pathway analyses in large cohorts and comprehensive genetic analyses on long-term weight loss and mechanisms in randomized diet intervention trials would provide very important evidence to unravel the etiology of obesity, and have significant public health and clinical implications. Establishing relationship between genetic variants and diets in determining weight change will help identify individuals at high risk for obesity especially when adherent to specific diet.
Abstract: Background: Obesity is a global pandemic affects all age groups and is independent risk factors for most chronic diseases. Dietary intervention is an essential component of obesity management. Dietary fibre supplements have the potential to facilitate weight reduction based on their viscosity. Up to date, the evidence of effects of some fibres on weight is inadequate, and literature provides insufficient information about the effects of the fibre viscosity in weight management. Objective: Two systematic reviews and meta-analyses of RCTs will be conducted to evaluate the effectiveness of viscous fibres, (agar, alginate, b-glucan from oat and barley, guar gum, glucomannan, pectin, PGX, psyllium), on body weight reduction. Methods: Only randomised controlled trials are accepted. The trails must have one of the selected fibres as a supplement, and the outcomes must have body weight, BMI, waist circumference, or body fat percentage. Studies shorter than 4 weeks are excluded. Three databases, (Medline, EMBASE, and Cochrane library), were searched through 04/03/2016. Results: After removing duplicates, 82 studies will be reviewed in full. Significance: This meta-analysis is the first meta-analysis that is based on fibre viscosity, and it will quantify the effect of each fibre in improving weight loss. It will also direct future research in the best direction to further explore this area.
Older hypogonadal obese veterans previously participated in a 6 month lifestyle change (diet-induced weight loss and exercise) study with or without testosterone replacement therapy before being followed for the following year at the clinic while receiving standard of care consisting of diet and exercise counseling (for healthy lifestyle change) and testosterone replacement therapy. This study will determine if long-term lifestyle change and testosterone replacement therapy with associated improvement in physical and metabolic health can be maintained in obese older adults.