Scientists suggests that there are four types of virtual reality: immersive virtual reality, desktop virtual reality (i.e., low-cost homebrew virtual reality), projection virtual reality, and simulation virtual reality. The sense of presence or immersion is a critical feature distinguishing virtual reality from other types of computer applications. It seems interesting whether immersion in virtual reality can influence the assessment of exercise capacity. The aim of the study is to assess the influence of the application of immersive virtual reality during an exercise capacity test on a bicycle ergometer. It is assumed that an exercise capacity test on a cycloergometer will be performed in a traditional form and in a virtual reality.