## 4 Discussion
For this reason, it should be considered that the same type of games, for example, dance may have different effects in different modes: different dancing games or a dancing game with different structure settings may affect the findings. Recently, it has become much more important to determine the AVGs' PA intensity, especially in college students who do not meet the minimum PA requirements. It is considered that the determination of vigorous AVG is important for individuals to use in practice when the vigorous PA alternatives are limited at home. Few studies in the literature have qualified the AVGs as vigorous PA (>6 MET) [16; 25; 30]. Consistent with the findings of the current study, the AVGs in which a player has to fight against an opponent [MET = 9.70 \(\pm\) 1.68] [16] or dance like hip-hop [MET = 6.63 \(\pm\) 1.02] [30] have been determined as vigorous PA.  
RER value shows the balance between oxygen consumption and carbon dioxide production. It is used to estimate the type and amount of nutrients (combination of carbohydrate, fat, protein) oxidized predominantly in energy production [46]. Muscles rely on glucose for energy during activity, which causes a higher RER value: the muscles' glucose need increases as the intensity of the workout increases. The RER values approach 1.0 as more carbohydrate is used [46] and increase over the \(\geq\)1.10 during maximum effort [47]. In the present study, the RER values during the AVGs were between 0.87-0.96. Strikingly, the present study's findings determined no differences between Just Dance and Shape Up Muscle AVGs in terms of VO2, EE, and MET, but the RER value was statistically higher in Shape Up Muscle AVG than in Just Dance AVG. This case shows that, even if the energy expenditure is similar among the AVGs, the energy source used by the muscles can vary depending on the game selection. Considering the RER values, it can be inferred that, even if a similar amount of calories is burned during these two games (Just Dance and Shape Up Muscle AVGs), more carbohydrates are burned in Shape Up Muscle AVG. It is important to be aware of these types of AVGs, especially for exercise prescription. Studies demonstrated that the RPE scores of AVGs were lower than classical exercises even though the exercise intensities were the same or similar [13; 25; 48; 49]. A study reported higher RPE scores for \"Your Shape Fitness Evolve\" AVG than \"Kinect Adventures\" AVG in young adults. However, there are no significant differences in RPE (determined with Omni-Scale) between Adventure, Boxing, and Dance AVGs in children [25]. In the current study, no significant differences were determined for RPE between Shape Up Muscle (14.67 \(\pm\) 1.23), Shape Up Cardio (13.92 \(\pm\) 1.88), and Fighter Within AVGs (13.75 \(\pm\) 1.48). The RPE scores reported above were significantly higher than the RPE scores reported for Fruit Ninja (10.33 \(\pm\) 2.57) and Just Dance (10.42 \(\pm\) 2.31) AVGs. As seen in Table 2, although the RPE scores for the three AVGs were not statistically different, significant differences were determined for physiological responses; the lowest responses were recorded in Shape Up Muscle AVG, where the RPE score was recorded as the highest. These findings suggest that RPE may not reflect the actual effort (measured physiological responses) in AVGs. Determining the level of enjoyment associated with performing PA is important for promoting and supporting an active lifestyle [50]. It is difficult to make a one-to-one comparison as different scales are used for enjoyment measurement in the literature. However, in general, studies have determined that playing AVGs is enjoyable for individuals [19; 25; 51] and showed that AVGs are more enjoyable than classical exercises [25; 38; 51]. In the present study, the Fighter Within AVG was observed as the most enjoyable game compared with others. In addition, the other games have been found to be quite entertaining (enjoyment score > 27; Table 2) and compatible with the literature.