In El cuerpo duradero we asked, in the first place, the status of the body in the process of building the philosophies of Nietzsche and Bergson, in order to consider the relation of the body in the process of internalization that the philosophical reflection supposes, secondly, from this approach, we asked for the significance of physiology in both philosophies and their comprehension of the relation of the human with the exterior reality and the reality of the interior processes. Without unknown the differences between both authors in what concerns to the work of the thinking and that they understand about reality, we try to braid their conception about physiology, establishing coincidences and, at the same time, turning points. Nevertheless, we propose a fundamental coincidence in that both philosophers think our basic relation with the world from the physiology and immanence of the living body in the world. Thereto refers the title, the term «duradero» that denotes the physical enduring, on the one hand, and the dynamic, on the other hand, the meaning of the physiology in both philosophers included this two aspects. Finally, besides this fundamental coincidence, we propose that both authors complement deeply, inasmuch as, who in appearance is more passionate, provides the physiological and contradictory character of the passions, and who, also in appearance, is more cerebral, provides the deepest experience of the flow of the real, the inner experience of time.