The treatment of the body as a mechanism to which the laws of physics are applied to study movement and athletic performance. The researcher studies kinesiology, which is the coordination of nerves, muscles, and joints required for physical activities. He is also familiar with the response of the body to various levels of exercise and stress, especially the cardiovascular and respiratory systems, and is familiar with related aspects of medicine and physiology. Sports science is a specialized field of biomechanics with the goals of enhancing physical health and performance; the prevention of injuries; and refining the design of sports equipment. The sports scientist is able to use tools to analyze physical activities, such as running or swimming, and suggest techniques for improvement. Often the researcher is an amateur athlete himself and enjoys many types of sports.