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Area of Science:

  • Human-Computer Interaction
  • Exercise Physiology
  • Perceptual Psychology

Background:

  • Virtual reality (VR) often presents a mismatch between perceived visual speed and actual movement.
  • Understanding factors influencing this perceptual discrepancy is crucial for immersive VR experiences.

Purpose of the Study:

  • To investigate how physical activity volume and fitness influence perceived visual speed in a treadmill-mediated VR environment.
  • To determine the relationship between physical characteristics and the underestimation of visual speed.

Main Methods:

  • Thirty healthy participants (sedentary, team sport players, expert runners) ran on a treadmill in front of a virtual scene.
  • Participants adjusted visual scene speed to match perceived running speed using a staircase method.
  • Perceived visual speed was compared against actual treadmill speed.

Main Results:

  • Sedentary individuals significantly underestimated visual speed compared to active participants.
  • The underestimation was speed-dependent and more pronounced in sedentary individuals.
  • Weekly physical activity volume was the strongest predictor of visual speed perception.

Conclusions:

  • Physical activity volume, not just fitness, is key to accurate visual speed perception in VR.
  • Personalized VR environments accounting for activity levels can improve user engagement and adherence.
  • Future VR systems should adapt visual feedback based on individual physical activity profiles.