Sarcopenia describes the age-related decline in skeletal muscle mass and function which leads to increased disability and loss of independence in older adults, and can be considered a component of frailty, which is similarly an age-related syndrome characterized by declines in multiple physical and psychosocial factors that result in reduced resilience to stressors. Sarcopenia and Frailty: A Guide to Screening, Diagnosis, Prevention and Treatment is a handbook that provides readers with an understanding of the current operational definitions of sarcopenia and frailty, and easy-to-follow instructions for performing and interpreting the necessary assessments to screen and diagnose both conditions. It also provides advice on the latest evidence related to treatment strategies for patients diagnosed with (or at increased risk of) sarcopenia and/or frailty, with a focus on prescribing exercise and nutrition interventions. This book is a valuable resource for researchers and clinicians who need to understand more the standardized approaches to performing and interpreting screenings and diagnosing and treating sarcopenia and frailty in older individuals.