Definition of Obesity BMI Classification of Obesity Metabolic Syndrome ( Syndrome 'X' ) Pathophysiology of Obesity ( Understanding Inflammatory process of Obesity & impaired Glucose Tolerance ) Diseases associated with Obesity : 1) Endocrine : DM , Metabolic syndrome 2) Cardiovascular : Systemic HTN , Heart Failure , Coronary Artery Disease 3) Respiratory : Effect on Lung Volume , Work of Breathing , Lung Compliance , Airway Resistance , Obstructive Sleep Apnea (OSA) , Obstructive Sleep Hypopnea (OSH) , Apnea Hypopnea Index (AHI) , Pickwickian Syndrome 4) GIT : NASH, GB diseases 5) Immunity impairment 6) Thrombo-embolism : DVT , PE 7) Musculoskeletal : Joint pain , OA 8) Nervous System : Autonomic and peripheral neuropathy.