since the 20th century bodybuilding has been an object of study that interests and challenges researchers in the sociology of sport (see Conquet, 2014 - Tajrobehkar, 2016 - Wellman, 2020) and, recently, in the philosophy of sport (see Aranyosi, 2017 - Madej, 2021 - Worthen, 2016). However, many of its problems are little known in the orthodox philosophical literature. Therefore, the aim of this paper is to contribute from STS studies to the posing and discussion of the central ethical and (...) social problems of bodybuilding by contributing to the philosophy of sport or the philosophy of body techniques. Therefore, I will plant the following problems in relation to bodybuilding: gender and sexism; racism, ableism and eugenics; and lastly, fatphobia. Finally, I propose that many of these problems are generated from the indiscriminate use of anabolic androgenic steroids (AAS) within this sport subculture. In this sense, a precautionary framework (epistemic values, moral values, hormonal benefit principle and sports precautionary principle) is proposed from STS studies with the aim of regulating their use, avoiding adverse effects in individuals who are not professional bodybuilders. -/- . (shrink)