Weight Outlooks by Restriction of Diet and Sleep

Not Applicable

Completed

• Conditions: Weight
• Interventions: Behavioral: Sleep & calorie restriction; Behavioral: Calorie restriction only

• Registration Number: NCT02413866
• Lead Sponsor: University of South Carolina

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 Timeline

• Study Start: 2015-01
• Study First Submitted: 2015-04-07
• Study First Submitted QC: 2015-04-09
• Study First Posted: 2015-04-10
• Primary Completion: 2016-11
• Study Completion: 2016-11
• Status Verified: 2016-12
• Last Update Submitted: 2019-04-17
• Last Update Posted: 2019-04-19

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 36

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

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Sleep & Calorie Restriction	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.
Calorie Restriction Only	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.

Primary Outcome Measures

Name	Time	Method
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.

Trial Locations

Locations (1)

University of South Carolina; 🇺🇸 Columbia, South Carolina, United States