Physical therapy, also known as physiotherapy, profession whose objective is to enhance movement and potential in persons with compromised physical functioning. Professionals within the field are referred as physical therapists. Often, persons who undergo physiotherapy have experienced a decrease in quality of life as a result of physical impairments or functional limitations caused by disease or injury. Individuals who often are in need of physiotherapy include those with back pain, elderly persons with arthritis or balance problems, injured athletes, infants with developmental disabilities, and persons who have had severe burns, strokes, or spinal cord injuries. Individuals with limb deficiencies are taught to use prosthetic replacement devices.