Interactive fitness tools offer a total-body workout with the Proform ZX2 Upright Exercise Bike. Designed with GameFit fitness games, the ZX2 allows you to play Fat Blocker and Calorie Destroyer while you exercise; the harder you work, the easier the game becomes! It also has an Interplay music port that accepts iPods or MP3 players, and a built-in sound system for crystal-clear audio.