Exploring the Impact of Size and Position on Visual Feedback Efficacy for Ballet Dancers

In balance training, such as ballet, observing one’s posture in a mirror makes it easier to maintain balance. By using projectors, it is possible to show the user’s posture from different angles, magnify specific body parts, and display the Center of Pressure (COP) trajectory in real time. This gives the user more visual feedback information than a mirror can provide, helping to improve balance. However, the appropriate projection position and size to enhance the effect of such visual feedback remains unclear. This study focuses on relevé in ballet and examines the effects of different types and positions of visual feedback on balance improvement. We conducted a user study and calculated balance metrics from COP data obtained from a balance board. The results indicate that only visual feedback projected directly at eye level in front of the user during relevé contributes to balance improvement. In contrast, visual feedback projected above eye level to the right did not show a clear effect on balance improvement.