View clinical trials related to Obesity.
Filter by:This study will evaluate the effectiveness of time-restricted eating (TRE), which is a form of intermittent fasting. When performing TRE, individuals consume all of their calories within a specific time window and then only consume water or other no calorie drinks the rest of the day. TRE is performed each day. There is no restriction on the quality or amount of food that people can consume during their eating window (ad libitum eating) with TRE, which can last anywhere from 4 to 12 hours. We are comparing three different 9-hour eating windows to determine whether the start and stop time of the eating window impact blood sugar control in individuals with obesity who also have or are at risk for type 2 diabetes. We also aim to determine if there are differences in the effects of the timing of eating window between males and females.
Non-syndromic monogenic obesity is a group of rare diseases characterized by severe and early onset obesity. Genetic characterization of these rare forms is important to target patients who may benefit from a personnalized care (new treatments, prognosis, adapted hygienic and dietary rules). This study aims to expand the diagnostic analysis from five to 71 genes and additionnaly to refine the causal role of some genes not widely tested in routine practice.
The most commonly used method in the management of body compositions of healthy individuals in the recent times is the application of physical activity together with a healthy nutrition (diet). The application of diet together with physical activity cause significant changes in the body composition (fat ratio, muscle mass, lean body mass, etc.). Physical activity can be done with traditional physical activity methods as well as with virtual reality applications. Virtual reality is a simulation or a metaversal facet of a real environment created by a computer or various other electronic devices that allows one or more users to interact with certain elements in a simulated virtual frame through a human-machine interface. Virtual reality applications are generally classified as immersive and non-immersive virtual reality . Commercial games such as Sony Playstation, Microsoft Kinect Xbox 360, Nintendo Wii can be given as examples of non-immersive virtual reality . In order to preserve body composition, different exercise applications can be recommended in addition to the diet program. In the literature, many studies involving diet, physical activity or a combination of these two applications have been experimentally planned and carried out in a controlled manner. In these studies, moderate body weight loss (1-5 kg) was reported with only physical activity. It is a general opinion that diet therapy in addition to planned physical activity (exercise) provides more effective and healthier results than people who lose weight with only diet programs or only exercise. It has been stated in previous studies that body composition and physical fitness improve with virtual reality application as happened wih diet intervention. However, due to the fact that access to virtual reality applications is not very easy, longitudinal studies are needed to evaluate whether they should be included in general body composition and physical fitness improvement programs. At this point, the main purpose of this study is to compare and evaluate the effects of virtual reality applications and healthy nutrition program on improving body composition and physical fitness.
This study uses a noninvasive technique called transcranial magnetic stimulation (TMS) to study satiety in healthy individuals. TMS is a noninvasive way of stimulating the brain, using a magnetic field to change activity in the brain. The magnetic field is produced by a coil that is held next to the scalp. In this study, the investigators will be stimulating the brain to learn more about the role of the cerebellum in satiety.
Obesity and iron deficiency are the nutritional disorders with the highest prevalence worldwide. Different mechanisms have been proposed to explain iron deficiency secondary to obesity. Among the most studied is the deficit in dietary iron intake or the increase in blood volume that increases the need for the metal. However, one of the most plausible mechanisms linking obesity and iron deficiency is low-grade systemic inflammation, through the iron metabolism intermediate known as hepcidin. The investigators objective is to evaluate the effect of weight loss by caloric restriction on hepcidin and serum iron concentration in people living with obesity and iron deficiency. The study will be divided into two phases: Phase 1: A cross-sectional study (cases and controls) to compare hepcidin levels, iron status and inflammatory markers in people living with and without obesity. The second phase consists of an open-label randomized controlled clinical trial. Individuals living with obesity who are iron deficient will be recruited and randomized to one of 2 dietary intervention groups with 60-day follow-up. The intervention groups will be: diet with caloric restriction rich in protein (with red meat) and diet with caloric restriction rich in protein (without red meat). Hepcidin levels, iron status and inflammatory markers will be determined at the beginning and end of the intervention. The nutritional intervention will have the following distribution of macronutrients in the diet: protein 1.5 g/kg of ideal weight, 50% carbohydrates and 25-30% fats.
The goal of this clinical trial is to prospectively assess the efficacy of the BLOOM program, a comprehensive weight loss dietary and lifestyle program, in a population of patients living with obesity and awaiting hip or knee surgery. The main questions it seeks to answer are: 1. Can the BLOOM program support these patients to lose up to 10% of their initial body weight? 2. Will patients continue to lose weight for the next six months after completing the program? 3. Does the BLOOM program help patients to improve their overall quality of life? Study participants will undergo the BLOOM program, a virtual pre-operative weight management program that spans 24 weeks and is carefully supervised by medical professionals. They will be recruited at the LEAF Clinic after being referred by their primary care physician. During the BLOOM program, they will meet with a physician (initially, then once monthly) and a dietitian (initially, and then biweekly as part of virtual group coaching). They will have access to LEAF's online learning portal. These are normal elements of the BLOOM program. Furthermore, as part of their participation in the research study, participants will be asked to complete the following questionnaires: the Mediterranean dietary score, the Oxford Hip and Knee Questionnaire and the EQ-D5-5L quality of life assessment. They will complete these initially, and then at completion of the program and 3 and 6 months post-program. We will also collect their height and weight at these intervals.
To determine the association between obesity phenotypes with cardiovascular diseases. - Primary Outcomes: 1- To examine the association between different obesity phenotypes and cardiovascular diseases.by using echocardiography, lipid profile - Secondary Outcomes: 1. frequency of obesity phenotypes on our locality 2. Correlation between each type of obesity phenotypes and other metabolic disturbances (e.g. DM, dyslipidemia, NASH) 3. Correlation between epcardial fat, carotid intimal thickness and different obesity phenotypes.
Although multidisciplinary treatment of pediatric obesity has shown its effectiveness in leading to weight loss and improvement in the physical, mental and social health of children and adolescents; maintaining these benefits remains a real challenge. Indeed, the literature clearly shows a short- to medium-term increase in weight, the mechanisms of which have yet to be identified in order to prevent it. Although cognitive, behavioral and nutritional adaptations have been highlighted to explain this weight regain, metabolic and energetic adaptations also seem to contribute. Indeed, a reduction in resting and total energy expenditure has been shown (in connection with changes in body composition and in particular lean mass), but also of the energy cost during locomotion and mobility, thus altering the daily energy balance. These energy adaptations are also accompanied by a modification in the use of energy substrates due to a modification of muscular metabolic flexibility in particular, leading to a reduction in lipid oxidation in favor of carbohydrates. Importantly, if this reduction in the use of lipids generates a counterproductive sparing of adipose tissue, thus slowing down weight loss, the increase in carbohydrate oxidation leads to an intensification of orexigenic signals at the central level, promoting nutritional compensations and positive energy balance and therefore contributing to weight regain. Thus, these adaptations of energy metabolism and their interactions with dietary control seem to be at the heart of the mechanisms limiting the success of obesity treatment, favoring weight gain. If these observations were made at the end of treatment programs lasting several weeks to months, a recent clinical work highlights the need to consider the kinetics and temporality of weight loss (weight loss variability and rate of weight loss), so as to identify the crucial stages where these adaptations take place and thus prevent their energy consequences. Thus, the main objective of this project is to study total energy adaptations (energy and nutritional metabolism) at rest but also during locomotion, during the central phase of weight loss of adolescents with obesity, as well as during phases of weight regain. Ultimately, the objective of this study is to better understand energetic adaptations to weight loss and the implication of the degree of weight loss in order to study the role of the interaction between these adaptations and the degree of weight loss on the success of programs and on the profiles of "weight maintainers" or "weight regainers".
The goal of this clinical trial is to compare the effectiveness of a mobile health intervention in adolescents (14-17 years) with overweight or obesity. The main question[s] it aims to answer are: 1) is a digital-based diet quality intervention for adolescents with overweight or obesity feasible and 2) is there preliminary effectiveness in improving diet quality? Participants will: 1. Complete three-day 24-hour dietary recalls 2. Collect urine samples 3. Wear a continuous glucose monitor, sleep tracker, and physical activity tracker Researchers will compare control and intervention groups to see if diet quality and meal timing traits improve as assessed by 24-hour dietary recalls, a novel urine biomarker, and continuous glucose monitoring (CGM).
The focus on this application is low-income, rural patients, since cardiovascular disease (CVD) prevalence is 40% higher among rural than urban residents. Health behavior counseling and follow-up care are required for patients with an elevated body mass index who have increased risk for CVD. Counseling is most effective when developed with, and tailored to, the patient and offered with resources that support healthy food intake and physical activity. Resource referral and follow-up is particularly important in rural low income residents who often have more severe social needs that impede healthy behaviors. The proposed research will leverage the candidate's digital health tool (PREVENT) for healthcare teams to use within the clinic visit. PREVENT visually displays patient-reported and electronic health record (EHR) data to facilitate counseling and deliver tailored physical activity and healthy food intake goals and resources. PREVENT may improve the quality of required care and promote cardiovascular health equity. This research will: 1) collaborate with rural and clinic partners to modify and integrate the PREVENT tool for low-income, rural patients with obesity (Aim 1); and 2) conduct a pilot pragmatic clinical trial of PREVENT to optimize feasibility, acceptability, appropriateness, and potential health equity impact.