Last year we wrote about Nintendo’s new Wii game software that was all the rage at retirement communities. Residents had formed bowling leagues, held tennis tournaments and even boxing matches.

Now Nintendo is helping everyone get a bit more fit. As noted in today’s NYTimes, Wii Fit debuted in Britain last month and was the fastest selling game ever in that country. And it is expected to so as well when it is rolled out in North America next week.

Wii Fit uses the same console and TV as the game Wii, plus a sensitive “balance board” placed on the floor to present a few dozen activities, from push-ups to yoga, to more entertaining challenges like balance games and aerobic contests.

Go Wii.