Ulitmate Balance Test
     At  the statistics screen (The screen after you choose your mii),
there  is  the  balance  board character running on a treadmill in the
background.  Click  him with your pointer and you will be asked if you
would like to participate in the ultimate balance test

Alternate Jogging Routes
     When  jogging,  occasionally  a  dog  will  run past you and your
trainer.  Quickly  sprint past the trainer and you will follow the dog
instead, taking you on a different route around the island.