  Physical activity or exercise can improve people's health and reduce their
risk of developing several diseases; most importantly, regular activity can
improve the quality of life. However, lack of time is one of the major barriers
for people doing exercise. High-intensity interval training (HIIT) can reduce
the time required for a healthy exercise regime but also bring similar benefits
of regular exercise. We present a boxing-based VR exergame called VirusBoxing
to promote physical activity for players. VirusBoxing provides players with a
platform for HIIT and empowers them with additional abilities to jab a distant
object without the need to aim at it precisely. In this paper, we discuss how
we adapted the HIIT protocol and gameplay features to empower players in a VR
exergame to give players an efficient, effective, and enjoyable exercise
experience.

Human-Computer Interaction