Book excerpt: Functional Testing in Human Performance offers clinicians the first-ever compilation of information on clinical and data-based functional testing for sport, exercise, and occupational settings. This unique text serves as a primary resource for accurate assessment of individuals' functional abilities in order to develop program prescriptions to enhance their performance. Functional Testing in Human Performance is a comprehensive learning tool for novices and an essential reference for advanced clinicians. The text defines the role of function in physical performance and how it can be appropriately tested. Especially helpful for novices, the text explains testing criteria, testing terms relevant to research, and selecting the most appropriate test and testing sequence. Common testing mistakes are also presented as well as pitfalls to avoid when testing. The text also includes case studies that illustrate a variety of situations--including testing for a client recovering from a lower-extremity injury, discussing preseason testing for a large group of athletes, and presenting the study of a client in an occupational setting. These cases include detailed statistical analysis and normative data, offering clinicians the opportunity to consider the application of functional testing and implementation strategies adaptable to their specific practice setting. After laying a foundation, the text progresses to detailed testing procedures for discrete physical parameters and specific regions of the body. Tests are organized from least to most complex, and each test is presented in a step-by-step manner outlining the purpose of the test, equipment needed, testing procedure and recommendations for performing the test, interpretation of results, and the data to suggest normative values, reliability, and validity for each test. This formatting facilitates quick reference to testing information for on-the-spot use, whether in the clinic, athletic training room, gym, or job site. Throughout the text, the functional tests are accompanied by photos for visual clarity. To enhance understanding, a companion DVD features live-action demonstrations of 40 of the most advanced tests. Icons on those test pages indicate they are modeled on the DVD. In addition, the DVD may be loaded onto a computer to offer convenient print-on-demand access to reproducible forms for recording data from selected tests. Functional Testing in Human Performance offers a unique and comprehensive reference for assessment of physical activities in sport, recreation, work, and daily living. By presenting the theory and detailing the practice, this text assists clinicians in understanding and incorporating functional testing to identify their patients' or clients' limitations and enhance their performance, rehabilitation, and daily functioning.