Weight
Conditions
Keywords
body composition, anthropometry
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.
Interventions
BEHAVIORALCalorie restriction only
Participants randomly assigned to this group will be instructed to reduce their daily energy intake to 95% of their resting metabolic rate.
BEHAVIORALSleep & calorie restriction
Participants randomly assigned to this group will be instructed to reduce their total time in bed by 90 minutes 5 days a week, in addition to restricting their dietary intake to approximately 95% of their resting metabolic rate.
Sponsors
University of South Carolina
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
OTHER
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
35 Years to 55 Years
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
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| body composition measured via DXA scans | 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. |
Countries
United States
Outcome results
None listed