Epidemiology of Aging, Disability, Frailty and Overall Role of Physiatry / Kanakadurga R. Poduri, and Maria Vanashkina -- Sarcopenia / Walter R. Frontera -- Osteoporosis and Fragility Fracture / Jae-Young Lim, Jaewon Beom, and Sang Y. Lee -- Fall Prevention and Intervention / Mooyeon Oh-Park and Michelle Didesch -- Central Nervous System Disorders Affecting Mobility in Older Adults / Carol Li, Blessen C. Eapen, Carlos A. Jaramillo and David X. Cifu -- Peripheral Nervous System and Vascular Disorders Affecting Mobility in Older Adults / Sewon Lee, Dennis D.J. Kim, and Mooyeon Oh-Park -- Arthritis and Joint Replacement / Peter J. Moley and Eric K. Holder -- Prevention of Hospital-Acquired Deconditioning / Der-Sheng Han and Shih-Ching Chen -- Polypharmacy and Mobility / Manisha S. Parulekar and Christopher K. Rogers -- Nutritional Issues and Swallowing in the Geriatric Population / Christina L. Bell and Shari Goo-Yoshino -- Diagnosis and Rehabilitation of Hearing Disorders in the Elderly / Chiemi Tanaka, Lisa D. Taniguchi, and Henry L. Lew -- Rehabilitation in Musculoskeletal and Sports Injuries in Older Adults / William Micheo and Luis A. Snchez -- Geriatric Psychiatric and Cognitive Disorders: Depression, Dementia, and Delirium / Yeonsil Moon, Mooyeon Oh-Park, and Jongmin Lee -- Exercise Recommendations for Older Adults for Prevention of Disability / David Z. Prince and Matthew N. Bartels -- Spine Disorders in Older Adults / Adele Meron and Venu Akuthota -- Assistive Technologies for Geriatric Population / Mooyeon Oh-Park and Jean H. Oh.