What's your Wii fitness age?

"Wii Sports fitness mode calculates a player's "fitness age", a rating with a scale from twenty to eighty, by gauging the player's performance in three randomly chosen challenges from the training mode. Calculating the fitness age takes into account a player's balance, speed, and stamina. The test itself can only be taken once a day per Mii. Fitness age results are graphed over one, two, or three months. Daily results are also posted on the Wii Message Board. This is analogous to Brain Age: Train Your Brain in Minutes a Day!, a game focusing on mental fitness, available for the Nintendo DS." - Wiki

I'd love to find out how they'll do this in the new Wii Fit "game"