Sports Medicine is a branch of medicine that deals with physical fitness and the treatment and prevention of injuries related to sports and exercise. Although most sports teams have employed team physicians for many years, it is only since the late 20th century that sports medicine has emerged as a distinct field of health care. Sports chiropractic is a specialty of chiropractic. It generally requires post-graduate coursework and a certification or diplomate status granted by a credentialing agency recognized in a practitioner's region. Assessment and diagnosis of sports-related injuries by a sports chiropractor involves a physical exam and sometimes imaging studies. Treatment is described as noninvasive and can include joint manipulations as well as recommendations for exercises designed to improve strength, flexibility, and range of motion.