Linking Temporal Patterns of Modifiable Behaviors to Weight Loss Outcomes

Inclusion Criteria: * Previous enrollment in standard behavioral weight loss intervention (NCT01985568 or NCT03411356) * Age 20-60 (This age range has been selected based upon the participants enrolled in the Parent Trial) * Capable and willing to give informed consent * Possess a smartphone to install and utilize the meal timing application * Capable and willing to wear the Actigraph, ActivPAL and Actiwatch-2 for 24 hours/day for 28 consecutive days * Willing to complete the Total Daily Energy Expenditure (TDEE) assessment which includes multiple urine collections and drinking stable water isotopes Exclusion Criteria: * Being considered unsafe to participate as determined by the study physician (Dr. Catennaci) * New diagnosis of a medical condition (not observed in the Parent Trial) which may affect weight or energy metabolism (e.g. depression, CVD, diabetes, uncontrolled hypertension, untreated thyroid, renal, hepatic diseases) * Women who became pregnant after completing the Parent Trial * Current use or use within the last 6 months of prescription or over-the-counter medications known to affect appetite, weight, and sleep