Weight Outlooks by Restriction of Diet and Sleep
Trial Snapshot
- Phase
- Not Applicable
- Status
- Completed
- Sponsor
- University of South Carolina
- Enrollment
- 36
- Locations
- 2
- Primary Endpoint
- body composition measured via DXA scans
Study Overview
Brief Summary
The purpose of this study is to examine whether chronic moderate sleep restriction effects the amount of body fat and lean mass loss, and calorie expenditure, in individuals who are participating in a dietary weight loss program.
Detailed Description
Participants will be randomly assigned to an 8-week program of either restricted diet alone, or restricted diet with restricted sleep for 5 days a week. The total expected duration of participation is approximately 3 months.
Study Design
- Study Type
- Interventional
- Allocation
- Randomized
- Intervention Model
- Parallel
- Primary Purpose
- Other
- Masking
- None
Eligibility Criteria
- Ages
- 35 Years to 55 Years (Adult)
- Sex
- All
- Accepts Healthy Volunteers
- Yes
Inclusion Criteria
- •age between 35-55 years,
- •BMI between 30-35 kg/meters squared,
- •total sleep time between 6.5-8 hours
Exclusion Criteria
- •work requiring changing schedule,
- •use of sleep aids or sleep medication
Arms & Interventions
Calorie Restriction Only
Participants in this group will be decreasing their caloric intake to approximately 95% of their resting metabolic rate. We will provide one meal for 4 days of the week, and participants will be required to keep an accurate dietary record of all food and drink. Participants assigned to this group will be instructed to keep a fixed sleep schedule based on their own sleep/napping habits.
Intervention: Calorie restriction only (Behavioral)
Sleep & Calorie Restriction
Participants in this group will decrease their caloric intake to approximately 95% of their resting metabolic rate in addition to reducing their total time in bed by 90 minutes 5 days a week.
Intervention: Sleep & calorie restriction (Behavioral)
Outcomes
Primary Outcomes
body composition measured via DXA scans
Time Frame: 4 months
Body composition will be measured via DXA scans prior to intervention and post intervention to compare losses in lean body mass and fat mass.
Secondary Outcomes
No secondary outcomes reported
Investigators
Xuewen Wang
Assistant Professor
University of South Carolina