Inclusion Criteria:  Adult participants (≥ 50 years of age) Clinical and spirometric diagnosis of COPD (FEV1 30-80%) Access to reliable internet connection Ability to mobilize independently and safely, with or without a walking aid  Exclusion Criteria:  Current participation in a pulmonary rehabilitation program Disease exacerbation in the past 3 months Diagnosis of a neurological or musculoskeletal condition that would interfere with safe performance of study tests (e.g., stroke, myopathy, inflammatory arthritis) Severe cognitive impairment ascertained by chart review or self-reported Coronary artery disease, pacemaker or implantable defibrillator, clinical diagnosis of congestive heart failure (CHF), or poorly controlled arrhythmias Medical instability (hepatic dysfunction, metabolic abnormalities, or active infection) Overt psychiatric disorder or substance abuse Patient on home oxygen therapy Insufficient English fluency and cognition to carry out testing and training Patient actively listed for lung transplantation