Weight Outlooks by Restriction of Diet and Sleep (WORDS)

University of South Carolina

Status: Completed

Conditions: Weight

Treatments: Behavioral: Sleep & calorie restriction; Behavioral: Calorie restriction only

Study type: Interventional

Funder types: Other

Identifiers

NCT02413866

Pro00036519

Details and patient eligibility

About

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.

Full 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.

Enrollment: 36 patients

Sex: All

Ages: 35 to 55 years old

Volunteers: Accepts Healthy Volunteers

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

Trial design

Primary purpose: Other

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: None (Open label)

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36 participants in 2 patient groups

Calorie Restriction Only

Experimental group

Description:

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.

Treatment:

Behavioral: Calorie restriction only

Sleep & Calorie Restriction

Experimental group

Description:

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.

Treatment:

Behavioral: Sleep & calorie restriction