(1) Background: Many young adults spend their time playing games and watching television. This type of spending time should be used effectively, so it's worth adding exercise and immersion to them. Bearing in mind that the video games and physical exercise also improve postural stability, motor time (MT) and reaction time (RT), it is worth reaching for new technologies with immersion that are widely available and can be used, for example, as a remote intervention. This study aimed to compare the effects of a low vs. high-immersive exercise environment on postural stability, RT and MT in young adults. (2) Methods: Ninety-three participants were randomly divided into a control group (CG; n = 48) and experimental group (EG; n = 45). The CG exercised according to the Tabata self-made video display on a television set, and the EG exercised according to the Audio Trip exergame. In addition to the postural stability, RT and MT, we monitored the heart rate, breath rate and energy expenditure for safety reasons and to note any differences. (3) Results: Significant differences were observed for both groups in RT (F(2.182) = 3.14, p = 0.046, η2 = 0.03) and MT (F(2.182) = 3.07, p = 0.049, η2 = 0.03) and in postural stability in eyes closed (EC): F(2.182) = 3.66, p = 0.028, η2 = 0.04 and eyes open in one leg (EO-OL): F(2.182) = 5.814, p = 0.04, η2 = 0.07. (4) Conclusions: The inclusion of a higher immersion produces greater improvements in RT, MT. Additionally, after a low-immersive exercise environment, participants have higher center of pressure (COP) path length values with EC and EO-OL tests, which testifies to less postural stability. Regarding COP trajectory, a smaller area surface means better performance for high-immersive participants after 30 min of exercise.
Keywords: exergaming; head-mounted display; health; health-related fitness; high-immersive; immersion; low-immersive; modern exercise; physical exercise; virtual reality.