The term Fitness seems to be defined rather subjective. An extensive amount of definitions can be found in literature but since the beginning of the 21st century, the term became popular in media as well. Especially on social networks, as part of the so called new media, a Fitness Boom can be observed. The attention draws to a new and individual depiction of the term “Fitness”. This thesis is going to examine and discuss this portrayal in detail. The aim is to give a clear understanding of how Fitness is depicted on Instagram. To begin with, a theoretical foundation about Fitness and its depending factors will be given. Definitions about Fitness will give background information and the connection to the body and its shape will be made and possible consequences will be discussed. Subsequently, the role of the impact of media is going to be examined with a focus on social networks. Instagram will be explained in detail with reference to the bloggers who work with it. The second part of this thesis consists of an empirical investigation on Instagram. Therefore, a mix of methods has been applied to focus on three female Fitness-blogger. Each of them will be addressed through an overview about their work, furthermore, their Instagramposts within 52 weeks will be counted and categorized. The outcomes, which will be compared and analyzed, reveal that there is a strong tendency towards the depiction of fitness through content which targets a body shaping process to attain the ideal body image. Many of the addressed definition from the theory part cannot be found within the Instagram-Posts at all. “Being fit” does not involve Sports and Nutrition as a meaning giving attribute like in literature but more as the bare tool to succeed in the goal of body shaping.