Clinical Trials Logo

Clinical Trial Summary

Reductions in fat oxidation and resting metabolic rate (RMR) are associated with normal aging and are accelerated with menopause. As a result, postmenopausal women have an increased risk of abdominal obesity and ultimately the metabolic complications that lead to the insulin resistance syndrome and its associated risks (hyperlipidemia, type 2 diabetes, and coronary heart disease). Thus, there is a need to determine the most successful treatment to reduce visceral obesity in postmenopausal women. The purpose of this study is to determine if dietary-induced weight loss alone and/or weight loss combined with exercise at low and high- intensities differentially affect the reduction in visceral adipose tissue in postmenopausal women with abdominal obesity.


Clinical Trial Description

Design Overview:

This study's protocol will last approximately 18 months. Phase 1 involves recruitment and screening followed by baseline research testing (Phase 2). Next, subjects will be randomly assigned to one of three 5-month treatments (Phase 3): diet and high-intensity exercise, diet and low-intensity exercise, or diet only. In the Maintenance Phase, subjects will return for visits at 6 & 12 months following the completion of their 5 month intervention.

Interventions:

All treatment groups will experience the same total weekly caloric deficit (-2800 kcal/wk), but will derive this deficit by different reductions in dietary intake and exercise energy expenditure. The weekly caloric deficit will be accomplished as follows: 1) the diet alone group will reduce dietary intake by ~2800 kcal/week (~400 kcal/day); 2) both exercise groups will expend ~400 kcal/wk in exercise energy expenditure and will reduce dietary intake by ~2400 kcal/wk (~340 kcal/day) to achieve the 2800 kcal/wk deficit.

The exercise will take place in an exercise facility at the Geriatric Research Center on the campus of the Wake Forest University/Baptist Medical Center. Two study personnel, including at least one trained technician, will supervise all exercise sessions. Emergency equipment will be kept on site during exercise sessions. Blood pressure and heart rate will be measured and recorded before each exercise session and participants will warm-up by walking for 3-5 min at a slow pace. Women will use the treadmill to exercise at an intensity of 45-50% (low-intensity AEX) or 70-75% (high-intensity AEX) of VO2max. Both groups will exercise 3 d/wk and duration of exercise will progress from 10-15 min the 1st week to 55 min by the end of the 6th week and thereafter for the low-intensity AEX group. The duration of exercise for the high-intensity AEX group will progress from 10-15 min the 1st week to 30 min by the end of the 6th week and thereafter. Injuries are minimized by a feasible progression of exercise duration as well as careful monitoring of proper footwear and stretching exercises.

The diet intervention will consist of monthly meetings with a registered dietitian along with consuming a hypocaloric diet provided by the GCRC metabolic kitchen. Subjects will be asked to pick up their food three times a week. Two meals per day will be provided. In addition, a calcium supplement (1000mg) will be provided. Subjects will be required to keep a diary of other foods consumed including the calcium supplement. The diets will be composed of 50-60% carbohydrate, 15-20% protein, and 25-30% fat with adequate amounts of essential nutrients. The number of calories given to each subject will be estimated from energy expenditure estimates in combination with an activity factor. The diet only group will be provided with an approximate 400 kcal/day energy deficit diet, while both exercise groups will be provided with an approximate 340 kcal/day energy deficit diet. Menus and specific food choices will be determined by GCRC dietitians in consultation with each research subject. ;


Study Design


Related Conditions & MeSH terms


NCT number NCT00664729
Study type Interventional
Source Wake Forest University Health Sciences
Contact
Status Completed
Phase N/A
Start date November 2002
Completion date November 2008

See also
  Status Clinical Trial Phase
Recruiting NCT04635202 - Effect of Elliptical Training on Metabolic Homeostasis in Metabolic Syndrome N/A
Completed NCT04053686 - An Intervention to Reduce Prolonged Sitting in Police Staff N/A
Completed NCT05343858 - Pilot Study to Evaluate the Effect of Two Microalgae Consumption on Metabolic Syndrome N/A
Active, not recruiting NCT05891834 - Study of INV-202 in Patients With Obesity and Metabolic Syndrome Phase 2
Recruiting NCT05040958 - Carotid Atherosclerotic Plaque Load and Neck Circumference
Completed NCT03644524 - Heat Therapy and Cardiometabolic Health in Obese Women N/A
Active, not recruiting NCT02500147 - Metformin for Ectopic Fat Deposition and Metabolic Markers in Polycystic Ovary Syndrome (PCOS) Phase 4
Recruiting NCT03227575 - Effects of Brisk Walking and Regular Intensity Exercise Interventions on Glycemic Control N/A
Recruiting NCT05972564 - The Effect of SGLT2 Inhibition on Adipose Inflammation and Endothelial Function Phase 1/Phase 2
Completed NCT03289897 - Non-invasive Rapid Assessment of NAFLD Using Magnetic Resonance Imaging With LiverMultiScan N/A
Recruiting NCT05956886 - Sleep Chatbot Intervention for Emerging Black/African American Adults N/A
Completed NCT06057896 - Effects of Combined Natural Molecules on Metabolic Syndrome in Menopausal Women
Active, not recruiting NCT03613740 - Effect of Fucoxanthin on the Metabolic Syndrome, Insulin Sensitivity and Insulin Secretion Phase 2
Completed NCT04498455 - Study of a Prebiotic Supplement to Mitigate Excessive Weight Gain Among Physicians in Residency Phase 4
Completed NCT05688917 - Green Coffee Effect on Metabolic Syndrome N/A
Completed NCT04117802 - Effects of Maple Syrup on Gut Microbiota Diversity and Metabolic Syndrome N/A
Completed NCT03697382 - Effect of Daily Steps on Fat Metabolism N/A
Completed NCT03241121 - Study of Eating Patterns With a Smartphone App and the Effects of Time Restricted Feeding in the Metabolic Syndrome N/A
Completed NCT04509206 - Virtual Teaching Kitchen N/A
Completed NCT05124847 - TREating Pediatric Obesity N/A