Diet, Healthy, Eating Behavior, Nutrition, Healthy, Time Restricted Eating
Conditions
Brief summary
The purpose of this study is to assess how time restricted eating interventions impact eating behaviors, diet quality, and body composition in women ages 20-29 years. Participants will be asked to limit all food and drinks (except water and some non-caloric beverages) to a 10-hour period during the day for four weeks. Participants 1-36 will follow their usual eating and activity patterns for one week before starting, and follow whatever eating pattern they want for 4 weeks after finishing. Participants 37-51 will follow their usual eating and activity patterns for one week before starting, and will not complete a follow up period.
Interventions
BEHAVIORALTime restricted eating
Limit food intake to 10 hours per day as described in the experimental arm section.
Sponsors
University of Delaware
Study design
Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
PREVENTION
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
20 Years to 29 Years
Healthy volunteers
Yes
Inclusion criteria
* Able to speak and read English * Own a smartphone * BMI ≥ 20 kg/m2 * Usual eating window ≥ 12 hours with the last eating occasion after 8pm on the majority of days * Have at least a moderate baseline level of dietary restraint
Exclusion criteria
* Shift workers * Being pregnant, nursing, or planning to become pregnant in the next 6 months * Having a past or current eating disorder diagnosis * Having a chronic medical condition (including diabetes, heart, kidney, or thyroid disease) or a condition that requires therapeutic diet or specified meal timing
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Emotional Eating | Participants 1-36: 3 time points: baseline, end of 4-week intervention, end of 4-week follow up Participants 37-51: 2 time points: baseline, end of 4-week intervention | Dutch Eating Behavior Questionnaire: Emotional Eating Subscale. This subscale is scored from 1-5, with higher scores indicating higher emotional eating. |
| External Eating | Participants 1-36: 3 time points: baseline, end of 4-week intervention, end of 4-week follow up Participants 37-51: 2 time points: baseline, end of 4-week intervention | Dutch Eating Behavior Questionnaire: External Eating Subscale. This subscale is scored from 1-5, with higher scores indicating higher external eating. |
| Eating in the Absence of Hunger | Participants 1-36: Baseline week, weeks 1 and 4 of intervention, weeks 1 and 4 of follow up Participants 37-51: Baseline week, weeks 1 and 4 of intervention | Assessed through surveys sent 5x/day asking about if food was eaten and why. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Diet Quality | Participants 1-36: 3 time points: baseline, end of 4-week intervention, end of 4-week follow up Participants 37-51: 2 time points: baseline, end of 4-week intervention | Healthy Eating Index, calculated from 3-day food records. The Healthy Eating Index is scored from 0-100, with higher scores indicating higher diet quality. |
| Body composition (total percent body fat) | Baseline and end of 4-week intervention (participants 1-36 only) | Percent body fat measured by DXA |
| Body composition (visceral fat) | Baseline and end of 4-week intervention (participants 1-36 only) | Visceral fat measured by DXA |
| Body weight | Participants 1-36: 3 time points: baseline, end of 4-week intervention, end of 4-week follow up Participants 37-51: 2 time points: baseline, end of 4-week intervention | Total body weight |
| Continuous Glucose Monitoring | First 10 days of study, last 7 days of intervention period (added for participants 37-51, optional for participants 29-36) | Participants will wear a Dexcom continuous glucose monitor |
Countries
United States
Contacts
PRINCIPAL_INVESTIGATORCarly Pacanowski, PhD
University of Delaware
Outcome results
None listed