The article aims to explore the women s use of social media as a tool for losing weight. Instagram was integrated to the daily routine of women that were seeking to eliminate fat excess by opening an exclusive account to share their regular routine of exercises and diet. Data for this study were based on 38 interviews of Brazilian women aged between 19-40 years old, which reduced up to 80 pounds in one year just by sharing their virtual diary of pictures (contents of exercises and meals) on Instagram. The outcome results remark the importance of the group (likes, positive comments and shares) for the maintenance of the primary objective that, in many cases, expanded to the offline life. Furthermore, the daily record in the virtual screen diary of the body changes increased the belief that it would be possible to tame the body to achieve their main goal: lose weight. In this context, technology becomes an important instrument that enables connection and interaction. The social network has become the space of sociability in the contemporaneity, being able to connect people who in similar style or objective of life, as the case of instafitness. From the common use of the network, women meet and form groups whose have the same purpose. Group formation is an relevant aspect, because it creates a virtual space, that reflects the regard, with the purpose of sharing painful feelings and emotions regarding the overweight body and the difficulty of being seen as part of feminine universe because of the fat.