Timing of Meals for Weight Loss (TIME)
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|ClinicalTrials.gov Identifier: NCT02204735|
Recruitment Status : Completed
First Posted : July 30, 2014
Last Update Posted : April 5, 2018
|Condition or disease||Intervention/treatment||Phase|
|Overweight Obesity Weight Loss||Behavioral: Eat majority of calories in the morning Behavioral: Eat the majority of calories in the evening||Not Applicable|
|Study Type :||Interventional (Clinical Trial)|
|Actual Enrollment :||8 participants|
|Intervention Model:||Parallel Assignment|
|Masking:||None (Open Label)|
|Official Title:||Timing of Meals for Weight Loss|
|Actual Study Start Date :||July 2014|
|Actual Primary Completion Date :||November 2017|
|Actual Study Completion Date :||November 2017|
Participants will be instructed to consume 50% of their energy intake in their first eating bout, 30% in their second eating bout, and 20% in their third eating bout. For example, a participant prescribed a 1200 kcal/d diet needs to consume 600 kcal in their first eating bout, 360 kcal in their second bout, and 240 kcal in their third bout. Participants will be provided with sample meal plans meeting this prescription.
Behavioral: Eat majority of calories in the morning
Participants will be instructed to consume 20% of their energy intake in their first eating bout, 30% in their second eating bout, and 50% in their third eating bout. For example, a participant prescribed a 1200 kcal/d diet needs to consume 240 kcal in their first eating bout, 360 kcal in their second bout, and 600 kcal in their third bout. Participants will be provided with sample meal plans meeting this prescription.
Behavioral: Eat the majority of calories in the evening
- weight [ Time Frame: 0 and 8 weeks ]Weight will be assessed by an electronic scale, and height will be assessed using a stadiometer, using standard procedures, with participants wearing light clothing, without shoes. BMI (kg/m2) will be calculated from these measures.
- physical activity [ Time Frame: 0 and 8 weeks ]the SenseWear® armband from BodyMedia will measure physical activity-related energy expenditure for the course of the study. Energy expenditure will be calculated using the corresponding software. This armband reports physical activity in total minutes and joules expended. Furthermore, this armband reports minutes of physical activity divided into 5 categories: sedentary activities (<1.5 METS), light physical activity (1.5-2.9 METS), moderate activity (3.0-5.9 METS), vigorous activity (6.0-8.9 METS), and very vigorous activity (≥9.0 METS). Minutes of active energy expenditure are also reported, which includes total number of minutes engaged in moderate, vigorous, or very vigorous activity. For each participant, mean minutes of sedentary, light, moderate, and vigorous activity (vigorous activity + very vigorous activity) will be calculated over the course of the 7 days.
- sleep [ Time Frame: 0 and 8 weeks ]participants will be instructed to wear the SenseWear® armband from BodyMedia® on their upper left arm for 7 days. Participants will be instructed to wear the armband for 23 hours a day for each of the 7-day time frames. The SenseWear® has been shown to be a reliable measurement for total sleep time in both individuals with and without obstructive sleep apnea. The SenseWear® armband recognizes the onset of sleep when there is a drop in the heat flux sensor (arm skin temperature).16 The BodyMedia® software then codes the output from the SenseWear® as either wake or sleep (regardless of sleep stage) binary codes,15 based on manufacturer sleep algorithms.16 The armband reports total minutes of lying down and total minutes wake/sleep during the lying down time, allowing sleep efficiency to be calculated. For each participant, minutes of sleep per 24 hrs and mean sleep efficiency will be calculated from the 7 days of measures.
- diet [ Time Frame: 0 and 8 weeks ]Energy and macronutrient intake overall and per eating bout will be assessed by 3 day (2 weekdays and 1 weekend) food records. Eating bouts will only be counted if at least 25 kcals were consumed. All foods and beverages, eaten within 1/2 h of the start of a meal, will be counted as a single eating bout. To determine dietary variables, each food record will be entered into the Nutrition Data System for Research (NDS-R) software developed by the Nutrition Coordinating Center, University of Minnesota, Minneapolis, Minnesota.
- feelings of hunger and fullness [ Time Frame: 0 and 8 weeks ]EMA protocol will be conducted over 7 continuous days using both semi-random and event-contingent sampling. Semi-random sampling will assess consumption cues (i.e. feelings of temptation, fullness, desire to eat, energy level and control over eating), along with feelings of hunger, satiation, and deprivation. Event-based sampling will assess these same cues and feelings, as well as reasons for initiating and terminating eating, Time-based and event-based sampling questions will be programmed and displayed using Satellite Forms™ MobileApp Designer software (Thacker Network Technologies Inc., Alberta, Canada).
To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT02204735
|United States, Tennessee|
|Univeristy of Tennessee--HEAL Lab|
|Knoxville, Tennessee, United States, 37996|
|Principal Investigator:||Hollie Raynor, Ph, RD||University of Tennessee|