Theres a big new demographic that rates their games completely differently than the traditional core gamer.
Who is making Carnival Games a best seller in the U.S.?  Its not you or me.  In a traditional rating system, the casual games can be quite poor, but a lot of people enjoy them.
Heres a slightly better Wii Fit impression 
 http://www.eurogamer.net/article.php?article_id=81819
I've heard fantastic things about the skiing, but this is the part that I found relevant enough to make the recommendation:
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				Wii Fit definitely seems to favour of a more sedate style of exercise: think yoga, pilates and tai chi. That's not to say it's easy, and you'll really feel the yoga poses in particular
			
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