Fitness game, exergame, and gamercise (portmanteaus of "exercise" and "game")[1][2][3] are terms used for video games that are also a form of exercise.[4] Fitness games rely on technology that tracks body movement or reaction. The genre has been used to challenge the stereotype of gaming as a sedentary activity, and promoting an active lifestyle among gamers.[5] Fitness games are seen as evolving from technology aimed at making exercise more fun.[6]