Nintendo is really trying to get us in shape for Summer! Set to make its official debut on May 26 here in the US, Personal Trainer: Walking works by sending data between a wireless activity pedometer (which you can place anywhere — even inside a bag!) and the infrared game card in your Nintendo DS or DSi to track your walking progress.
Your DS will record your daily step count, minute by minute, so you can always go back and see your activity level. And because the card can store up to five years of records, you'll see if you're improving from year to year!
Personal Trainer: Walking costs $49.99.