Obesity Clinical Trials

High body fat at midlife, as evidenced by overweight or obese body mass index (BMI), is increasingly understood as a risk factor for Alzheimer's disease. However, the underlying processes and mechanisms that may underlie this risk remains unknown. With this project, the Investigator proposes to create a new cohort of cognitively normal 120 midlife individuals, age 40-60 years. The investigator and research staff will characterize the participant's overweight or obese status using metabolic tests including, an oral glucose tolerance test, fasting plasma insulin, fasting plasma glucose, and hemoglobin A1c measurements. This testing will generate categories of metabolically abnormal overweight and obese (MAOO), metabolically normal overweight and obese (MNOO), and metabolically normal lean participants (MNLP). Research staff will evaluate differences between these groups on neuroimaging with the newer classification framework of Alzheimer's biomarkers with amyloid (A), tau (T), and neurodegeneration (N), or ATN. Neurodegeneration will be assessed by atrophy on brain MRI as reflected by regional volumes on Freesurfer. Staff will also evaluate MR neuroimaging markers for neuroinflammation using a newer method called diffusion basis spectrum imaging (DBSI), developed at the Mallinckrodt Institute of Radiology at Washington University in St. Louis in collaboration with The Charles F. and Joanne Knight Alzheimer's Disease Research Center (Knight ADRC). Read Less

The researchers will conduct 'Taxi ROADmAP (Realizing Optimization Around Diet And Physical activity)', which also utilizes MOST, and the same 4 obesity intervention components as in SANOS, but targets the overweight/obesity crisis in another at-risk, low socioeconomic status (SES) population, taxi and for-hire vehicle (FHV) drivers (Lyft, Uber, etc.). ROADMAP also utilizes an effectiveness- implementation hybrid type 1 design. Hybrid trials, which blend effectiveness and implementation studies, can lead to more rapid translational uptake and more effective implementation. Taxi and FHV drivers are a growing, multilingual, hard-to-reach, predominantly immigrant and minority essential worker population. There are over 750,000 licensed taxi and FHV drivers in in the U.S. and over 185,000 in New York City (NYC). They have higher rates of overweight/obese range body mass index (BMI) than New Yorkers in general (77% vs 56%) and have high rates of elevated waist circumference, sedentary behavior, poor diets, and health care services underutilization. ROADmAP will test 4 evidence- and theory-based (Social Cognitive Theory [SCT]) behavior change intervention components. We will use MOST to identify which of the 4 components contribute most significantly and cost-effectively to weight loss among NYC drivers recruited at workplace health fairs (HFs) and virtually. Objectives are to apply MOST to design an optimized version of a scalable, lifestyle intervention for taxi/FHV drivers, and then to conduct a mixed methods multistakeholder process evaluation to facilitate widespread intervention implementation. Read Less

This trial will examine the effect of semaglutide 2.4mg on changes in body weight, body composition, and peripheral and central mechanisms that control appetite, satiety, and food intake in the context of smoking cessation. Read Less

This study will look at whether accounting for the amount of pressure generated by the chest wall and abdomen in a obese patient, using a measurement called transpulmonary pressure, can help shorten the amount of time patients spend on the ventilator. By decreasing the amount of time patients spend on the ventilator, they are less likely to develop complications such as infections, weakness or more procedures. Read Less

This study tests whether a high-fiber diet based on legumes, such as dry beans, can lead to sustained reductions in obesity and colon cancer risk in persons at highest risk, namely overweight or obese, post-polypectomy patients. Read Less

Eating Better Together is a 6-month pilot program that teaches families about healthy eating and activity and provides home deliveries of fresh fruits and vegetables from a local retail partner. Read Less

The obesity epidemic continues to be a major public health concern, impacting nearly one-fifth of US children. One of the most robust predictors of childhood obesity risk is parental obesity and children who are overweight by age 5 are at increased risk for future obesity. A healthful diet is a significant part of preventing overweight and obesity and the home food environment can be a predictor of children's dietary intake. The goal of the proposed pilot study is to examine the feasibility and efficacy of a new family-based approach to early childhood obesity prevention, using optimal defaults in the form of pre-filled, default online grocery shopping carts to promote healthier grocery shopping among families with young children at risk for obesity, potentially influencing the home food environment and dietary intake. Read Less

The goal of this clinical trial is to learn about the alterations insulin resistance and metabolic flexibility following a transition to an obesogenic lifestyle in fit young men. The main questions it aims to answer are: Does the addition of excess carbohydrates when transitioning to a sedentary lifestyle promote insulin resistance in fit young men? Does the addition of excess carbohydrates when transitioning to a sedentary lifestyle lower the body's ability to break down fats and carbohydrates in fit young men? Read Less

Approximately 42% of American adults are obese, and this condition is strongly related to the development of colorectal cancer. Innovative lifestyle strategies to treat obesity and reduce colorectal cancer risk are critically needed. This research will demonstrate that time-restricted eating, a type of intermittent fasting, is an effective therapy to help obese individuals reduce and control their body weight and prevent the development of colorectal cancer. Read Less

African American adults that live in economically disadvantaged areas are at an increased risk for obesity and cardiometabolic disease. The treatment program being tested in this research study aims to address these factors and increase outcomes for the study population. The purpose of this research study is to find out about the feasibility and acceptability of using house chats (HC) as a model for a weight loss program in a real-world, community-based setting. Read Less

This pilot study investigates the effects of a newly developed 12-week weight management program called "GameDay Ready" (compared to a walking and general health education program) for decreasing body weight among Black men who live in the rural South. The researchers expect to see evidence of greater weight loss among participants randomized to receive the "GameDay Ready" program. Read Less

African American adults that live in economically disadvantaged areas are at an increased risk for obesity and cardiometabolic disease. The treatment program being tested in this research study aims to address these factors and increase outcomes for the study population. The purpose of this research study is to find out about the feasibility and acceptability of using house chats (HC) as a model for a weight loss program in a real-world, community-based setting. Read Less