A useful definition of physical therapy is: The treatment of disease by physical and mechanical means (such as massage, regulated exercise, water, light, heat, and electricity). - Merriam-Webster Dictionary

Physical therapy is the art and science of utilizing physical medicine to treat patients with mechanical, physiological, developmental impairment, functional limitations, disabilities or other health-related conditions in order to restore function.

Physical therapy can provide relief for low back pain and migraine headaches, help in recovery after injuries following an automobile or other accident, or regaining physical abilities after a stroke or surgery.