RemI for Post-Bariatric Surgery Weight Regain
The goal of this clinical trial is to test the effectiveness of remotely-delivered interventions (utilizing acceptance-based behavioral treatment skills (ABTi)) amongst bariatric surgery populations who are experiencing weight regain postoperatively (> 5% from their lowest postoperative weight and after postoperative Month 6). Investigators aim to evaluate ABTi's efficacy for reversing weight regain and its effect on targeted weight control behaviors and weight-related comorbidities by comparing participants randomly assigned ABTi (n = 100) to those assigned to a Control group that also receives brief phone calls but that focus on reiterating instruction on the dietary and behavioral changes required of surgery and initially taught preoperatively (C, n = 100).

The main research aims are:

To compare changes in body weight over 12 months in 200 bariatric patients who have regained > 5% of their weight and are randomly assigned to ABTi or Control.
To compare changes in eating behaviors (i.e., caloric intake, frequency of maladaptive eating behaviors), physical activity, and weight-related comorbidities (i.e., biomarkers of diabetes, hypertension) over 12 months in the two groups.
Exploratory - To test ABTi's theoretical mechanisms of action, including a) effects of theory-based active ingredients (i.e., acceptance, defusion, values clarity, mindfulness) on weight outcomes and b) changes in impact of internal states (i.e., hunger, cravings) on eating behavior.
- EligibilityCriteria: Inclusion Criteria:  Men and women Ages 18-70 years old Weight regain of at least 5% from lowest postoperative weight Underwent gastric bypass or sleeve gastrectomy within 6 to 48 months prior to enrollment Ability to give consent Ability to speak, write, and understand English  Exclusion Criteria:  Long-term treatment with oral steroids Current use of weight loss medication (OTC or prescription) Current pregnancy or plan to become pregnant within 12 months Psychiatric hospitalization in the past 6 months Documented or self-reported psychiatric diagnosis that would interfere with adherence to the study protocol or acute suicidality Self-report of alcohol or substance abuse within the past 12 months Current, self-reported use of tobacco products Weight loss > 10 lbs in the past 3 month History of more than one bariatric procedure Inability to walk at least one city block without assistance - HealthyVolunteers: Accepts Healthy Volunteers - Gender: All - MinimumAge: 18 Years - MaximumAge: 70 Years - StdAgeList: Adult, Older Adult