Exercise may rewire the brain to fight weight regain after surgery

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Age 18-70 years * Body mass index (BMI) \>19 kg/m2 and body weight\< 250kg * Participants must have experienced a clinically significant weight regain, defined as over 10% of their maximum weight lost, within 1 to 5 years following their bariatric surgery. They will be asked to self-report their weight loss history. Participants must also provide the operative report from their bariatric surgery for reference. * In good general health with no conditions that could influence the outcome of the trial, and in the judgment of the investigator is a good candidate for the study based on review of available medical history, physical examination and clinical laboratory evaluations * Willing to adhere to the protocol requirements for the duration of the study Exclusion Criteria: * Type 1 diabetes mellitus * Peripheral neuropathy with insensate feet * Recent blood donation within the last 2 months * Use of beta-blockers * Current pregnancy or breastfeeding * Active Heart or lung disease * Severe hypertension (systolic \>160 mmHg or diastolic \>90 mmHg) * Inability to exercise for any reason * Any known contraindication to exercise testing based on current ACSM guidelines * MRI contraindications, such as presence of pacemakers, aneurysm clips, artificial heart valves, ear implants, metal fragments, or foreign objects in the eyes, skin, or body * Known presence of a structural brain lesion (e.g. tumor, cortical infarct) * Presence of another neurologic disorder, which could impact findings (e.g. multiple sclerosis) * History of cardiovascular disease, stroke, congestive heart failure * Active hematological, renal, pulmonary or hepatic disorders * Active treatment for cancer * A history of active alcohol or substance abuse * Any significant systemic illness or unstable medical condition which could lead to difficulty complying with the study protocol * History of claustrophobia and inability to tolerate an MRI * Body weight \>250kgr and largest body diameter of 70cm as there is a certain weight and diameter limit of the MRI scanner * Unwilling or unable to return for study visits, undergo neuropsychological testing and MRI imaging * Left-handedness