Sleep Timing and Energy Balance

Summary

The purpose of this study is to test the effects of sleep and meal timing, independent of sleep duration, on glucose regulation and metabolic and hormonal control of energy balance in normal weight adults.

This study will be a 4-phase, randomized controlled study of 5 days each in which participants will undergo 2 phases of late sleep times that differ in meal timing (normal or late) and 2 phases of normal sleep times that differ in meal timing (normal or late).

The Aims and Hypotheses of this study are:

Aim 1: To compare hormonal regulation of food intake and metabolic risk markers in response to altered sleep and meal timing.

* Hypothesis 1: There will be an interaction between sleep and meal time on glucose, insulin, and glucose and insulin area under the curve after the glucose tolerance test such that the late sleep/late meal will result in the worst metabolic profile, normal sleep/late meal and late sleep/normal meal will have an intermediate profile, and normal sleep/normal meal will result in the best metabolic profile.
* Hypothesis 2: There will be an interaction between sleep and meal time on leptin and ghrelin concentrations such that the late sleep/late meal timing phase will result in low leptin/high ghrelin, normal sleep/late meal timing and late sleep/normal meal will have an intermediate profile, and normal sleep/normal meal timing will result in high leptin/low ghrelin.

Aim 2: To compare food intake over a 24-h period in response to altered sleep and meal timing.

• Hypothesis 3: Energy and fat intakes will be greater during the late sleep timing phase compared to normal sleep timing.

Conditions

• Sleep
• Meals

Interventions

BEHAVIORAL

Normal sleep

Normal sleep= sleep 2300-0700

BEHAVIORAL

Normal meals

Normal meal times=approximately 1.5, 5, and 11 h after wake up for breakfast, lunch, and dinner, and snack at 13 h after wake up time

BEHAVIORAL

Late sleep

Late sleep=sleep at 0230-1030 hours

BEHAVIORAL

Late meals

Late meal times= approximately 4.5, 7, and 13 h after wake up time for breakfast, lunch and dinner, and snack at 15 h.

Sponsors & Collaborators

• St. Luke's-Roosevelt Hospital Center

  lead OTHER

Study Design

Allocation

RANDOMIZED

Purpose

PREVENTION

Masking

NONE

Model

CROSSOVER

Eligibility

Min Age

20 Years

Max Age

45 Years

Sex

ALL

Healthy Volunteers

Yes

Timeline & Regulatory

Start

2012-11-30

Primary Completion

2013-09-30

Completion

2013-09-30

Countries

• United States

Study Locations