RT conference output T1 Foot Placement Feedback in Physical Training: Effects of Spatial User Interfaces on Performance and Workload in Virtual Reality A1 Resch, Stefan A1 Hanania, Jean Gabriel A1 Schor, Daniel A1 Johannes, Esrom A1 Kovac, Benedikt-Josip A1 Schwind, Valentin A1 Völz, Diana A1 Sánchez Morillo, Daniel A2 Ingeniería en AutomáticaElectrónica, Arquitectura y Redes de Computadores K1 Virtual Reality K1 Foot Augmentation K1 Visual Feedback K1 Spatial User Interface K1 Agility Ladder Training AB Agility ladder training is commonly used in fitness and therapy to improve coordination in lower-limb exercises by training precise foot placement. Previous research adapted this training approach to immersive environments and emphasized both the potential and the need for enhanced visual feedback in virtual reality (VR) to improve training outcomes. However, effective visual guidance for such tasks in VR remains underexplored, as it is unclear how spatial user interfaces (UIs) should be designed to support accurate foot placement. To address this gap, we conducted a within-subject study with 40 participants, investigating the effects of two visualization techniques: a Foot-Aligned UI (exocentric, attached to the feet) and a Head-Aligned UI (egocentric, floating in view); combined with color-coded performance feedback. Foot positioning accuracy, rotational control, success rate, and perceived workload were measured during VR-based agility ladder tasks. Results show that the Foot-Aligned UI significantly improved foot placement success rates without increasing cognitive load, compared to the Head-Aligned UI and No UI conditions, which was supported by qualitative feedback. In contrast, color-coded step feedback was perceived as helpful but showed no measurable performance benefit. Based on these findings, we derive design recommendations for spatial UIs to support lower-limb motor training in VR. PB Association for Computing Machinery, Inc SN 9798400712593 YR 2025 FD 2025 LK http://hdl.handle.net/10498/39512 UL http://hdl.handle.net/10498/39512 LA eng DS Repositorio Institucional de la Universidad de Cádiz RD 21-sep-2026