In Sight of Insights: Virtual Representation of Boxing for Interactive Viewpoint in Tactical Analysis through 3D...

Combat sports such as boxing require rapid tactical decision-making and precise spatio-temporal awareness, yet current analysis primarily relies on video replays and statistical charts. Fixed viewpoints and occlusion constrain video replays, while statistical data are displayed separately, requiring users to mentally correlate information across sources. Although prior sports analytics research has explored event detection, action recognition, and video overlays, few systems support spatially navigable motion reconstruction with integrated tactical annotations for real combat-sport matches. To address this gap, we conducted a formative study with professional boxing coaches and developed In Sight of Insights, a desktop immersive analytics system that reconstructs athlete motion from sparse multi-view video and embeds match events within a unified 3D virtual environment. By coupling contextual information with reconstructed motion, the system enables free-viewpoint tactical observation while preserving links to source video evidence. We evaluated our system through two user studies with professional athletes and experienced spectators. The results provide preliminary evidence that Free-viewpoint Virtual Representation can improve tactical observation accuracy and support comparable analytical efficiency relative to a video-based workflow with access to the same annotated match data. Participants also reported that free viewpoint perspectives and integrated contextual visualization enhanced tactical understanding. These findings position reconstructed 3D environments with embedded analytics as a promising approach for combat-sport tactical analysis, while highlighting practical constraints around annotation effort, capture setup, and evaluation scale.