starting neoadjuvant or adjuvant intravenous chemotherapy
ECOG \<3;
Oncologist approval to participate;
English speaking (all study materials and study staff will be in English)
Willing and able to adhere to study intervention
You may not be if
Individuals who do not have access to a smart phone with Bluetooth capability (required for Fitbit and for responding to intervention text messages) or at least a shared cell phone with someone in the same household (i.e., some couples may share a phone).
Type 1 or type 2 diabetes who require exogenous insulin (due to the potential need to adjust insulin dosing with TRE) or with hemoglobin A1c \>10%
Research MRI contraindications (e.g., pacemaker, magnetic implants, pregnancy)
Uncontrolled thyroid disorder
Self-reported eating disorder history
Body mass index \<18.5 kg/m2 or clinical signs of cachexia (discretion of treating oncologist)
≥5% body weight loss within last 6 months
Those who are currently working night/rotating shifts, eating within ≤10-hour window or consistently eating less than 3 meals/day in the past 3 months.
patients who meet the criteria for medical clearance prior to exercise using the Physical Activity Readiness Questionnaire+ and are not cleared by their treating oncologist or family physician to perform maximal exercise testing.
