I kinda weird to say, but the game I played the most on the Wii U was Wii Fit U! I just bought it to try stop being lazy and had a lot of fun actually. And since the Wii U had a lot of downs during his life, I don't have many good games to play ot it.
Well, according with my more or less 100 hours of exercises on it, the part of my body I exercises mostly was my legs. Not on purpose, I wiould focus in my arms, since they are week, but the legs exercises were easier.

Hm... seens like don't draw for so long because I lost my will is starting to make me lose my very few skill...