As much as I'd like to state how dumb this sounds, I guess there are people out there who don't exercise often and are not very knowledgeable when it comes to warming up and stretching. I suppose with nearly 15m? copies floating around, there are bound to be a generous percentage of users who are new to exercise and are using this as a tool to get them in shape. I'm not sure if proper pre-workout stretching/warmup procedures are recommended in the manual/game or not, but I guess having them would be beneficial.
Honestly though, I'd think people could be smart enough to realize that Wii Fit should be a supplement to normal exercise instead of the end all fix to their physical well being. I find it hard to believe that I live in a generation that requires warning labels for such things.
Person 1: Does Valkyria Chronicles have trophies?
Person 2: No.
Person 1: Forget it. I'm not buying it.
Person 2: Wait! It's amazing! Unique, charming, drop dead gorgeous... Hello?