Abstract
Dementia is one of the most serious problems in aging society. Aerobic exercise has good evidence for prevention of it. Walking and cycling are popular and practical aerobic exercises. However, elderly people have problems in the walking and cycling, which come from lacks of physical / mental functionalities and traffic environment. For them we have developed virtual reality (VR) walking / cycling system. In this paper, software system, which can easily and rapidly construct big-scale computer graphic data for the VR walking / cycling system, was described. The performance of the software was evaluated with benchmark tests. Some applications of the software are also introduced.
