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The primary aim of this study is to compare the changes in body weight between a technology-based system, an in-person behavioral weight loss intervention, and a combination of both during a 12 month behavioral weight loss intervention in adults. Sedentary, healthy overweight and obese adults will be recruited to participate. Assessments will be conducted at 0, 6, and 12 months. This is a randomized trial in which participants will be randomized to one of three groups: standard behavioral weight loss (SBWL), standard behavioral weight loss plus technology (SBWL+TECH), and technology alone alone (TECH).
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Standard weight loss intervention | Experimental |
| |
| Standard weight loss intervention plus technology | Experimental |
| |
| Technology only | Experimental |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Standard weight loss intervention | Behavioral | In-person weight loss sessions, dietary intake prescription of 1200-1500 kcal per day, exercise progressing to 300 minutes per week. |
| Measure | Description | Time Frame |
|---|---|---|
| weight | Body weight will be assessed on a digital scale to assess change in body weight over the intervention period. | change from 0 to 6 months |
| Measure | Description | Time Frame |
|---|---|---|
| cardiorespiratory fitness | A graded exercise test on a treadmill along with indirect calorimetry will be used to measure cardiorespiratory fitness. This will provide a measure of oxygen consumption and metabolic equivalents of work at the time of test termination. | 0, 6, 12, months |
| body composition |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| John M. Jakicic, PhD | University of Pittsburgh | Principal Investigator |
| Steve Verba, MS | University of Pittsburgh | Study Director |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| University of Pittsburgh | Pittsburgh | Pennsylvania | 15260 | United States |
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| ID | Term |
|---|---|
| D009765 | Obesity |
| ID | Term |
|---|---|
| D050177 | Overweight |
| D044343 | Overnutrition |
| D009748 | Nutrition Disorders |
| D009750 | Nutritional and Metabolic Diseases |
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| ID | Term |
|---|---|
| D013672 | Technology |
| ID | Term |
|---|---|
| D013676 | Technology, Industry, and Agriculture |
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| Standard weight loss intervention plus technology | Behavioral | In-person weight loss sessions, dietary intake prescription of 1200-1500 kcal per day, exercise progressing to 300 minutes per week, plus technology to provide real-time feedback on energy expenditure, plus a website to log dietary intake. |
|
| Technology only | Behavioral | One intervention telephone call per month, dietary intake prescription of 1200-1500 kcal per day, exercise progressing to 300 minutes per week, plus technology to provide real-time feedback on energy expenditure, plus a website to log dietary intake. |
|
Body composition will be assessed using dual energy X-ray absorptiometry (DXA). This will provide a measure of lean body mass, fat mass, bone mineral content, and percent body fat. |
| 0, 6, 12 months |
| physical activity | A questionnaire and a portable device worn on the upper arm will be used to measure and quantify energy expenditure from physical activity. | 0, 6, 12 months |
| dietary intake | A questionnaire will be used to assess self-reported food intake. This will be used to estimate calories, dietary fat, protein, and carbohydrates consumed. | 0, 6, 12 months |
| psychosocial and behavioral measures | Questionnaires will be used to assess self-efficacy for weight loss and physical activity, barriers to physical activity and weight loss, expected outcomes resulting from physical activity and weight loss, perceived body image, depressive symptomotology, weight history, dietary disinhibition and restraint, and behaviors typically related to weight loss (e.g., self-weighing, meal planning, etc.). | 0, 6, 12 months |
| Weight change | Body weight measured on a digital scale | weight at 0, 6, and 12 months |
| D001835 |
| Body Weight |
| D012816 | Signs and Symptoms |
| D013568 | Pathological Conditions, Signs and Symptoms |