Instructions
Click the box with a picture of a dumbbell on the bottom right of the screen to bring up the "Training" option.
Play the training game of your choice until you win at least a bronze medal.
Go back to the "Training" menu and a second training game for that sport will be unlocked. It is possible to unlock three training games for each of the five sports, which means unlocking all the training games will make 15 more ways to play available.