American College of Sports Medicine 
ACSM’s Guidelines for Exercise Testing and Prescription [EPUB ebook] 

The tenth edition reflects some crucial and exciting changes, making the content necessary for effective study and practice. New pre-exercise health screening recommendations are critical to helping more of the population begin a safe, healthy physical activity program without consulting a physician. New and expanded information on the risks of sedentary behavior, clinical exercise testing and interpretation, high intensity interval training, musculoskeletal injury risk, fitness testing protocols and norms, and an expansion of the principles of health behavior change are included. Additionally, significant reorganization of content will help you reach the information you need quickly. This manual is an essential resource for all exercise professionals, as well as other health professionals who may council patients on exercise including physicians, nurses, physician’s assistants, physical and occupational therapists, dieticians, and health care administrators.