This article is focused on the major features of the Martha Rogers grand theory and Susan Leddy's Human Energy Model, a middle range theory. Roger's theory talks about Human being and the environment as energy fields, while Leddy's Human Energy Model explains the three aspects of universal essence: matter, information and energy. The article is based on a real case scenario. The aim of this paper is to compare the above mentioned theorists, impact on the outcomes and their relationship with the clinical scenario in their own approaches.