Physical therapy is a profession that uses scientifically proven non-invasive interventions to reduce pain and restore function in people dealing with injury, disability or disease. Physical therapy care and services are provided by or under the supervision of a physical therapist. Physical therapists are the only professionals who provide physical therapy. Physical therapists are health care professionals who examine, evaluate and treat people with health conditions resulting from injury or disease. Most physical therapists hold master's degrees and all have extensive education in anatomy and body mechanics. Many physical therapists may also specialize in one or more specific area, including cardiopulmonary, clinical electrophysiology, geriatrics, neurology, orthopedics, pediatrics and sports physical therapy. Physical therapists know how the musculoskeletal system works; yet recognize that each individual is unique. They are specially trained to improve movement and function. A thorough evaluation is performed that includes a patient's history, observation of posture and movement and palpation (using hands to feel and "see" the problem). Testing for muscle strength, range of motion, and other special tests may also be included in the evaluation. A treatment plan is then formed to fit each patient's individual needs and goals. The tools of physical therapy take a variety of forms, but certainly the most commonly used are therapeutic exercise, mobilization and manipulation, massage, heat, cold, hydrotherapy, aquatic therapy, ultrasound and electrical stimulation. Even more important for treatment than the tools is the unique appreciation that physical therapists have for the workings of the human body. For decades, physical therapists have demonstrated their power both in treating existing conditions and in helping to prevent their recurrence. Physical therapists and the tools they use are an integral, and increasingly important part of modern health care.