The term 'TOP' is an acronym for 'Theory of the Stretch', which is a concept developed by Dr. Robert L. Satterwhite, a professor at the University of North Carolina at Chapel Hill. The Theory of the Stretch states that stretching can improve performance and reduce the risk of injury. It suggests that stretching should be done before and after exercise, as well as during rest periods. The Theory of the Stretch also emphasizes the importance of proper form and technique when stretching.