Mengyan Guo et al.
Physical activity (PA) data are collected and visualized to promote awareness and motivation, yet research on their public presentation remains fragmented across HCI subcommunities. We focus on the public context as a critical yet underexplored setting, where PA data are made visible beyond private interfaces in co-located environments, posing opportunities and challenges for interaction. To build a systematic understanding, we analyze a representative corpus of 30 evaluated samples of PA data public presentations in terms of data input, presentation output, display context, and interactivity. Synthesizing evaluation results across studies, we identify four impacts at the affective, cognitive, behavioral, and social levels. We examine privacy issues in public settings. This work provides the first structured overview of PA data public presentation research across HCI domains. We further discuss nine design considerations and three research agendas, bridging perspectives from PA data presentation, health promotion, and social interaction in public contexts to inform future design and research in this emerging domain.