Brand film for C3fit IN-Pulse, a product that lets you measure your heartbeat just by wearing it. Heart rate data sent from runners was converted into beats in real time through programming and a PA system, then played on a track and field course. The film documents the creation of “heartbeat music,” generated by the heartbeat rhythms played by multiple runners and the ensemble they formed together. Although it was a technically demanding project, the skills and focus of the elite team led by Kosai Sekine worked a miracle, successfully capturing the runners at their very best. While highlighting the product’s features, the film keeps its narrative focus squarely on “people,” getting as close as possible to the runners’ genuine emotional shifts—moments of inspiration, excitement, and a sense of accomplishment.