RESUMO
The text sets out to examine so-called "interdisciplinary" research practices when researchers work on health issues. The article specifies the author's approach, which departs from both a normative posture and a purely epistemological approach, instead opting to study an interdisciplinary act in progress. Based on an ANR report led by Trabal, Collinet and Terral (2014), the research presented mobilizes the latest developments in socio-informatics to examine forms of interdisciplinarity in two areas - doping and obesity. It appears that the research on doping is marked by strong asymmetries between disciplines, and that "true" interdisciplinarity is often postponed when it does not seem to lend itself to a simple mode of coordination. In the case of obesity, we observe that practices are marked by staging and display work; the demand for interdisciplinarity is combined with a desire to structure a professional identity. In all cases, we were able to identify some trails that have been blazed to enable researchers to respond jointly to disciplinary and interdisciplinary injunctions. The promise is an interesting figure that relies on a postponement of proof, made possible by weak codification of interdisciplinarity.