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Sports clubs (SCs) are an ideal setting for promoting health. However existing health promotion (HP) interventions in SCs mainly target a single health behavior and men who do sports, and evaluations of such interventions provides little information about their deployment. To overcome these limitations, the PROSCeSS intervention was co-constructed based on the theoretical model of the health-promoting SC and multi-level, multi-determinant health strategies. The aim of this pilot study was to evaluate the deployment of the PROSCeSS intervention and identify the factors influencing its deployment. A qualitative study, using recordings of meetings, email and telephone exchanges, and interviews with project leaders of fourteen SC, was carried out. Although a low number of SCs had completed the intervention, they all considered that they have a role to play in helping their members maintain good health. Their ability to develop HP activities and to implement the intervention was influenced by the resources available, the support they received from their sports federation, and the ability of each project leader to get involved in the intervention. The SCs that deployed the intervention implemented several strategies enabling them to integrate health into the organizational, social, economic, and environmental habits of the SCs and to develop new HP activities, such as adapted sports activity sessions and activities to teach members about first aid, nutrition, and good practices for warming up. This study highlights the importance of understanding the specificities of the contexts in which HP interventions are deployed. Having led to a reworking of the intervention steps and the development of an appropriate evaluation design, it also highlights the essential role of pilot studies in the development and evaluation of interventions.