Optimizing Just-in-Time Adaptive Intervention to Improve Dietary Adherence in Behavioral Obesity Treatment: A Micro-randomized Trial

Inclusion Criteria

Inclusion Criteria: * Age 18-70 * Body mass index (BMI) between 25 and 50 kg/m-squared * Diagnosis of one or more cardiovascular disease risk factors (prediabetes, type 2 diabetes, hypercholesterolemia, or hypertension) * Able to walk 2 city blocks without stopping Exclusion Criteria: * Currently participating in another weight loss program * Currently taking weight loss medication * Lost \> 5% of their body weight in the 6 months prior to enrolling * Has been pregnant within the 6 months prior to enrolling * Plans to become pregnant within 6 months of enrolling * Has chest pain during periods of activity or rest, or loss of consciousness in the 12 months prior to enrolling * Has any medical condition that would affect the safety of participating in unsupervised physical activity * Has history of bariatric surgery * Has any condition that would result in inability to follow the study protocol, including terminal illness, substance abuse, eating disorder (not including Binge Eating Disorder) and untreated major psychiatric illness.