View clinical trials related to Overweight.
Filter by:This study aims to increase physical activity among overweight African-American women with mobility limitations.
In this study, we will clarify the degree of insulin resistance and characterise muscle glucose metabolism and gene expression in a group of overweight healthy women. The study will clarify how overweight influences body glucose metabolism and thereby in the long-run increases the risk for developing type 2 diabetes. Moreover, the study may clarify why some overweight women develop hormone disorders and diabetes while others remain healthy. The study is essential as many patients suffer from diseases aggravated by overweight. In addition, a genetic disposition for diabetes or polycystic ovary syndrome may give rise to the disease if the patient gains weight. It is therefore important that weight-matched control subjects are included in projects with overweight patients. This clinical trial includes 10 overweight women with regular hormones and normal level of male sex hormone. The patients included must be healthy, take no medications influencing the study results. The subjects must take no contraceptive pills or receive any other hormone treatment. In connection with the investigation, the following will be carried out on all patients: clinical examination, blood tests, hyperinsulinaemic euglycaemic clamp, muscle biopsies, bone scan. The purpose of the study is to gain more knowledge of how overweight influences women's risk of developing hormone diseases and diabetes.
This study will examine hormonal differences in ghrelin and growth hormone in obese and normal weight adolescents and their relationship to body composition and insulin resistance. The study will also investigate the effect of the macronutrient composition of a meal on postprandial ghrelin levels and whether ghrelin responses will predict the degree of hunger and caloric intake at a subsequent meal.
This study will examine the health effects of calcium supplements in overweight adults. Overweight adults often eat a diet low in calcium. Some studies have found low calcium intake in people who have some of the medical problems often seen in overweight adults. This study will see if extra calcium improves the health of overweight adults. Volunteers in general good health 18 years of age or older who are overweight (body mass index equal to or greater than 25 kilograms per square meter of body surface) may be eligible for this study. Women who are pregnant or breastfeeding may not participate. The study includes four visits, described below. Visit 1 Volunteers will be screened for participation in the study with a medical history, physical examination, and blood and urine tests. At home, they will collect a 24-hour urine sample; fill out questionnaires to assess their average calcium intake; and record their food intake for 7 days. Those enrolled in the study will continue with the next 3 visits. Visit 2 Participants will complete a physical activity questionnaire, have their food diary reviewed, and meet with a dietitian for nutritional counseling. Triceps fold thickness and waist and hip circumferences will be measured three times. Body composition will be analyzed by a DEXA study. For this procedure, the subject lies on a flat table while a small dose of X-rays is passed through the body. Participants will be randomly assigned to take either calcium carbonate (1500 mg/day) or placebo capsules twice a day by mouth for 2 years. (The placebo looks like the calcium capsules but contains no calcium.) They will receive a 6-month supply of study capsules during visit 2 and return to NIH every 6 months for the next supply. They will also be sent questionnaires by mail every 3 months to complete information about health problems and how often the study capsules are being taken. Visits 3 and 4 Visit 3 is scheduled after participants have taken the study capsules for 1 year; visit 4 is scheduled after 2 years (the end of the study). At each of these visits, participants will have a DEXA scan, blood and urine tests, blood pressure measurements, and measurements of height, weight, waist and hip circumference. They will complete questionnaires about their medical history, side effects of the study medications, dietary calcium intake, and physical activity, and they will meet with one of the study investigators to talk about any concerns regarding the study. At the fourth visit, participants will answer some additional questions about their study participation and return the Diet History Questionnaire that was mailed to them before the visit.
To investigate the effects of different amounts of exercise on both cardiorespiratory fitness and risk factors for cardiovascular disease in sedentary, overweight, mildly hypertensive, but healthy, postmenopausal women aged 45 to 75 years.
This study focuses on the way weight is gained. Individuals who gain weight primarily in their midsection (visceral weight) are at an increased risk for developing diabetes and high blood pressure. Research has shown that African Americans suffer more often from high blood pressure, diabetes (non-insulin dependent), and heart disease than Caucasian Americans. These conditions lead to significant numbers of deaths and diseases associated with and made worse by obesity. African American women in particular suffer from obesity and the associated conditions of obesity more than any other race or gender. However, it is unknown if the conditions seen in African American women are a result of the obesity or differences in their insulin sensitivity, glucose disposal, or fat metabolism. This study will compare body composition, total and resting energy expenditure, and glucose disposal of obese African American and Caucasian children and of non-obese children of obese African American and Caucasian parents, to characterize the timing and nature of factors that may contribute to the prevalence of obesity and its complications. Patients participating in this study will be followed for 15 years and be evaluated every 5 years during the study.<TAB>