Weight Gain, Weight Loss, Weight Loss Maintenance
Conditions
Keywords
obesity, time-restricted eating, weight-loss maintenance
Brief summary
The TWIST 2.0 Study is a 12-month, 2-arm RCT in adults with recent weight loss. We will examine the efficacy of TRE on weight (Aim 1a) and fat mass (Aim 1b) regain, and describe changes in subjective appetite following a mixed-meal tolerance test (Exploratory).
Detailed description
The TWIST 2.0 Study is a 12-month, 2-arm RCT in adults with recent weight loss. We will examine the efficacy of TRE on weight (Aim 1a) and fat mass (Aim 1b) regain, and describe changes in subjective appetite following a mixed-meal tolerance test (Exploratory). Potential participants will be screened via telephone and eligible participants will attend an in-person screening visit where they will complete questionnaires and have their height and weight measured. We will perform a 4-week run-in period to establish weight stabilization and measure eating patterns before randomization. Eligible participants following the run-in period will be randomized with equal allocation to one of the 2 arms: 1) TRE intervention ≤10-hr/day TRE intervention); or 2) CON. At baseline, 6 and 12 month measurements, participants will complete a bioelectrical impedance analysis (BIA) and dual energy x-ray absorptiometry (DEXA) scan by a certified radiology technician. Within each arm, participants will be randomized to either complete or not complete a mixed meal tolerance test in which they will consume a small portion of a protein shake and complete a visual analog scale (VAS) on their subjective hunger/fullness. Participants in both arms will receive one-page handouts (i.e., advice) on topics to assist with weight maintenance. The only between-group differences are the TRE arm will be instructed to follow a restricted eating window of ≤10 hr/day, self-monitor foods and beverages into a smartphone app, measure body weight using a Bluetooth-enabled scale, and receive behavioral counseling directed at sustaining adherence to the TRE intervention. The CON arm will be unrestricted in their eating window and encouraged to eat a habitual breakfast, lunch, and dinner. No additional contact will be made between the CON arm and interventionist during the 12 months unless we schedule a measurement visit. Digital newsletters will be provided every month for the first 6 mos, and then every other month containing complementary information on WLM to engage participants in the CON arm. The same newsletters will be going to the TRE.
Interventions
BEHAVIORALTRE
Participants randomized to the TRE arm will be instructed to consume all food and beverages in a self-selected 10-hr eating window.
BEHAVIORALWeight-Loss Maintenance Advice
The CON arm participants will receive written baseline advice following randomization assignment that includes determinants associated with long-term weight-loss maintenance success (e.g., physical activity, and strategies to limit calorie intake).
Sponsors
National Heart, Lung, and Blood Institute (NHLBI)
NYU Langone Health
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
25 Years to 65 Years
Healthy volunteers
No
Inclusion criteria
* ≥5% non-surgical weight loss in the last 3 mos; * current BMI 20.5-45 mg/kg2; * between the ages 25 to 65 years old; * own a smartphone or willing to use a smartphone if provided for self-monitoring. For in-person screening, eligible participants will provide signed informed consent and have their temporal eating patterns measured.
Exclusion criteria
* pregnant, trying to get pregnant or breastfeeding; * previous or planned bariatric surgery; * previous or current history of eating disorder; * ongoing participation in another weight-management research study; * continued participation in a weight loss program other than the proposed study; * currently on appetite suppressants; * currently following intermittent fasting; or skipping meals; * eating window \<11h 59min/day; * perform overnight shift work more than once a week; * work that includes travel across one or more time zones; * taking medications that affect body weight or would preclude TRE; * unable or unwilling to provide informed consent; * unable to participate meaningfully in the intervention (e.g., uncorrected sight and hearing impairment); * unwilling to accept randomization assignment; * unable to log at least 2 meals into the smartphone app for 70% (\ 20 days) during of the run-in period; * have type 1 or type 2 diabetes, or other conditions that would preclude restricted eating windows; * narcolepsy, * \>2.5 kg additional weight loss during run-in phase (weight regain is not an
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Absolute Body Weight Change | Baseline, Month 6, Month 12 | — |
| Percent Body Weight Change | Baseline, Month 6, Month 12 | — |
| Percentage of Participants with Successful Weight Loss-Maintenance (WLM) | Baseline, Month 6, Month 12 | WLM defined as regaining ≤25% of initial weight loss. |
| Absolute Fat Mass Change Measured with DEXA | Baseline, Month 6, Month 12 | Assessed using dual-energy x-ray absorptiometry (DEXA) scan. |
| Percent Fat Mass Change Measured with DEXA | Baseline, Month 6, Month 12 | Assessed using dual-energy x-ray absorptiometry (DEXA) scan. |
Other
| Measure | Time frame | Description |
|---|---|---|
| Incremental Area Under the Curve (iAUC) for appetite using a Visual Analog Scale (VAS) | Baseline, Month 6, Month 12 | The VAS allows participants to rate their appetite on a Likert scale from 1-10. |
Countries
United States
Contacts
Primary ContactCollin Popp
Backup ContactMargaret Curran
Outcome results
None listed