The goal of this study is to examine whether real-time feedback provided by a virtual trainer avatar during virtual reality (VR) exercise influences participants' exercise well-being and movement accuracy. The study also aims to compare different types of feedback delivered by the avatar. The main questions this study aims to answer are: Does real-time avatar feedback improve exercise well-being during VR-based training? Does real-time avatar feedback improve movement accuracy during exercise? Are there differences between no feedback, verbal feedback, and combined verbal-gestural feedback? Researchers will compare three VR exercise conditions: no feedback, verbal feedback, and combined verbal-gestural feedback, using a randomized crossover design so that each participant experiences all conditions. Participants will: Take part in three VR exercise sessions, each lasting approximately 15 minutes Complete the sessions under different feedback conditions, with the order randomized Perform guided physical exercises while wearing a VR headset and following a virtual trainer avatar Provide self-reported ratings of exercise experience after each session This study is an interventional, randomized crossover trial conducted in adults, with all procedures completed during a single study period.
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Exercise Accuracy Index (EAI) based on motion tracking during VR exercise
Timeframe: During each VR training session across fourteen moderate-intensity exercises (up to three sessions per participant); not assessed during inter-exercise rest periods or during the final low-intensity cool-down exercise.
Exercise Well-Being
Timeframe: Immediately after each VR training session via computer-assisted web-based questionnaire (CAWI), up to three sessions per participant.