Active clinical trials for "Weight Loss"

This study is designed to determine whether obese, normal weight, and successful weight loss maintainers differ in their food choice decision-making and/or executive function, and whether participation in a behavioral weight loss program leads to neural and/or behavioral changes. The investigators will examine behavioral performance on several tasks involving decision-making and self-control in conjunction with brain imaging data acquired during a food-choice decision-making task. Participants enrolled in the behavioral weight loss program will also be assessed following the treatment.

1. Background / Scientific Rationale The VEW (Vomiting, Eating, and Weight Loss) Questionnaire has been developed as a method for the assessment of post bariatric surgery patients, as well as a research tool into the eating behaviour of these patients. Objective VEW Questionnaire Premise If used optimally the VEW score is a valuable tool for patients who have had Laparoscopic Gastric Band Surgery (LAGB). The VEW score will be able to assist clinicians treating patients with a LAGB, specifically the Swedish Adjustable Gastric Band (SAGB), by providing them a tool to enhance patient outcomes. By using the information gained from the VEW questionnaire we can assess many areas of the eating behavior, and adjustment outcomes in patients with Gastric Bands. Hypotheses: The VEW questionnaire aids in the assessment of the need for gastric band adjustment (up or down in volume) Comparison of patient factors in those who have had a good outcome (increased weight loss) bad outcomes (vomiting, low weight loss, maladaption), from a gastric band fluid addition In patients who have had a bad outcome, which factors are more predictive? Fewer Complications associated with Gastric Band Adjustments Obstruction Need for urgent deflation Pain on eating Lowering incidence of inappropriate fills Lower incidence of maladaption Eating behavior can predict long term outcomes o By comparison of factors in the different quartiles of weight loss (particularly top 25% cf. bottom 25%) Maintenance of weight loss after 12 months is best achieved by use of behavior modification via improved food tolerances and better eating behavior than by increasing restriction of the band by further adjustments. 12 months is chosen as an arbitrary time where the majority of expected weight loss (45% of expected 50-55% 0f EWL) has been achieved. It is also a time frame by which patients have learnt to use the band appropriately, and the gastric band has had time to be adjusted into its optimal range. The VEW questionnaire can help predict poor outcomes from a SAGB adjustment. By analyzing the factors in patients who have returned both acutely (days) or at subsequent visits (weeks) and had fluid removed from their bands. These factors would include pain, vomiting, length of meals, maladaption score, fluid added, etc.

Obesity has been found to be a risk factor for female infertility. Studies have indicated that obese men often have poor semen quality and require increased time to make partner pregnant. To date, no studies have investigated the effect of weight reduction on male fertility. The purpose of this study is to investigate the effect of weight reduction in overweight and obese men on their reproductive function.

The purpose of this registry is to evaluate if sleeve gastrectomy surgery will help with symptoms of delayed gastric emptying for patients suffering from diabetic gastroparesis.

Background: - Many people can lose weight by changing their diet or exercise. However, most people eventually regain the weight over time. This weight regain may be related to changes in metabolism as well as changes in the brain caused by weight loss. Researchers want to learn more about these changes. Objective: - To see how weight loss and regain affects the body s metabolism and the brain of obese but healthy adults. Eligibility: - Obese but healthy adults age 18-55 who plan to participate in a weight loss program at one of several participating clinics or resorts. Design: Participants will first be screened at home through questionnaires and telephone interviews. Participants will then be screened at the NIH with blood tests, medical history, physical exam, electrocardiograms, and questionnaires. They will have a mock magnetic resonance imaging (MRI) scan. At visit 1, participants will stay at the NIH and will: have MRI and PET brain scans. have body composition scans and measurements. give blood samples. eat a special diet. wear a physical activity monitor. provide a urine sample and body weight daily. drink a special type of water to measure calorie burn. wear a clear plastic hood over their head while lying down, to collect exhaled air. spend 24 hours in a room that measures oxygen and carbon dioxide. complete questionnaires and computer tasks. After visit 1, participants will give daily urine samples and weight and physical activity measurements from home. Then they will follow a lifestyle intervention for weight loss and give daily weight and activity measurements. Visits 2, 3, and 4 occur 1-26 months after the start of the weight loss program. Participants will repeat procedures from visit 1. Visits 1-4 last 4 days each. Researchers will track participants weight and physical activity for up to 26 months after visit 2.

The purpose with this study is to investigate whether gastric bypass surgery and the following weight reduction impact the tone in esophageal sphincters and the esophageal function. In a previous study our group used high resolution solid-state manometry to investigate the pressure in the esophagus and esophageal sphincters in obese patients going through laparoscopic bariatric surgery. These studies showed that the barrier pressure between the stomach and esophagus is significantly lower in obese compared to lean patients. In this study the investigators will examine these patients once more, now after weight reduction to see whether the barrier pressure is back to normal compared to lean patients.

The objectives of the present study are: to evaluate if overnight weight loss is dependent on sleep structure assessed by polysomnography; to compare weight loss rate during sleep and awake rest; to compare night weight loss profile of normal and obese volunteers.

Obesity affects on fertility. Obese women have lower pregnancy rate after infertility treatments.They need more doses of hormone during ovarian stimulation, more days for stimulation. During IVF treatment less oocytes are collected and the quality of embryo also harmed. The first line treatment for those women with obesity and infertility is weight loss. The investigators' hypothesis is that weight reduction improves ovarian reserve and fertility treatment outcome.

Bariatric surgery is increasingly practiced, as it is the most efficient treatment for morbid obesity. More than eighty percent of the operated patients are women. Nethertheless, few is known about gynecologic long-term impact of such surgeries, especially regarding pelvic floor disorders (PFD). This work aims at studying the evolution of PFD in women following a bariatric surgery more than 18 months ago in a French university center Hospital.

This study is intended to report changes in the weight and metabolic indicators of the subjects six months after the end of the study for adults with a risk factor of 27 kg/m2 or higher (formerly the research task name[clinicaltrial.gov;NCT03675191]).