The term reps is commonly used in the exercise realm as a shortened version of repetitions, or the number of times a particular movement is performed for any particular time segment. The title REPS makes reference to the aforementioned and serves as the acronym for the title in its entirety: Rehabilitation Exercise Progression System. In any professional setting where rehabilitation is performed—medicine, sports, schools, and fitness / personal training—a system for prescribing and administering rehabilitation exercise is necessary in order to provide the best outcomes for patients and/or clients. Once a condition is identified, it can be challenging to determine where to start and what to prescribe. Certain factors such as the individual characteristics and level of conditioning of the patient/client must be considered. The scope and purpose for making choices in a rehabilitation exercise regimen must be based on a foundation of movement that is naturally human. Next, selection of appropriate exercises and a plan for progression to attain rehabilitation goals, both personal and clinical, need to be implemented. This book takes into account all these factors and presents a comprehensive rehabilitation system with progressions to take the guesswork out of the equation for achieving outstanding results for the busy practitioner.