Physical therapy, which is the care and services provided by or under the direction and supervision of a physical therapist, includes: 1) examining and evaluating patients with health-related conditions, impairments, functional limitations, and disability in order to determine a diagnosis, prognosis, and intervention, 2) alleviating impairments and functional limitations by designing, implementing, and modifying therapeutic interventions, 3) preventing injury, impairments, functional limitations, and disability, including promoting and maintaining fitness, health, and quality of life in all age populations, and 4) engaging in consultation, education, and research. Adopted by the American Physical Therapy Association (APTA).