Empowered With Movement to Prevent Obesity and Weight Regain

Inclusion Criteria: * 65-85 years * BMI=30-45 kg/m2 * Weight stable-no loss or gain (±5%) in past 6 mo * Sedentary * No contraindication for safe and optimal participation in exercise training * Approved for participation by Medical Director * Willing to provide informed consent * Agree to all study procedures and assessments * Able to provide own transportation to study visits and intervention Exclusion Criteria: * Dependent on cane or walker * Reported unintentional or intentional weight loss or gain of \>5% in past 6 mo Participation in regular resistance training and/or \> 20 mins/day of aerobic exercise in past 6 months * Cognitive impairment (MoCA score \<22) * Low bone density (T-score \< -2.3 on hip or spine scan) * Severe arthritis, or other musculoskeletal disorder * Joint replacement or other orthopedic surgery in past 6 mos * Joint replacement or other orthopedic surgery planned in next 2 years * Uncontrolled resting hypertension (\>160/90 mmHg); * Current or recent past (within 1 year) severe symptomatic heart disease, uncontrolled angina, stroke, chronic respiratory disease other than asthma or COPD, any disease requiring oxygen use, neurological or hematological disease; cancer requiring treatment in past year, except non-melanoma skin cancers * Serious conduction disorder, new Q waves or ST-segment depression (\>3 mm), or uncontrolled arrhythmia * Room air SpO2 (oxygen saturation) at rest or with exercise qualifying for supplementary oxygen (SpO2≤88%) * Abnormal kidney or liver function (2x upper limit of normal); * eGFR \<45 mL/min/1.73m2 * Anemia (Hb\<13 g/dL in men/ \<12 g/dL in women); * Uncontrolled diabetes (fasting glucose \>140 mg/dl); * Deficient levels of vitamin D (25 hydroxyvitamin D level \< 20 ng/mL) in those not taking a vitamin D supplement; * Smoker (No nicotine in past yr) * No heavy alcohol use (\>14 drinks/week) * Unstable severe depression * Regular use of: growth hormones, oral steroids, weight loss medications or prescription osteoporosis meds * Current participation in other research study