According to Nintendo's website, "Wii Fit is a combination of fitness and fun, designed for everyone, young and old. By playing Wii Fit a little every day, you, your friends, and your family can work towards personal goals of better health and fitness." Hm, I'm not so sure about that. Indeed, otherwise sedentary individuals may find it helps build a basic level of fitness, but for runners and other participants in more rigorous exercise, replacing such a workout routine with that of the Wii Fits would be quite detrimental to one's performance.
The "running" game requires the user to hold onto the Wii remote as they essentially hop in place, with the options of simultaneously watching TV, exploring the 12 virtual trails in the game with either your trainer or a dog, or accompanying a fellow gamer on a two-person run.
Perhaps it's the dedicated, hardcore runner in me, but after watching this YouTube video of the Wii's so-called "running," I feel calling it this almost makes a mockery of the sport. In fact, the movements of this game much more similarly mimic the motions of jump-roping.
Yet, the Wii Fit also presents itself as a very light cross-training possibility. If it's a rest or recovery day, playing a couple matches of tennis or boxing with a friend might be a viable option.
I suppose the plus to "running" on Wii's trail network is that it's just about impossible to get lost, mugged, stuck in sticky situations, caught in hazardous weather, or stopped by intersections and traffic lights. But then where's the fun in running?