You don't need a
hamster to be trained to exercise it, just get a cage with a exercising wheel, or get a plastic exercising
ball so it can run around
in it, but never let your
hamster be
unsupervised in the
ball, and never leave your
hamster in the
ball for more than 30 minutes, take it out at the 15 minute mark to get a drink then but it back
in the
ball for 15 minutes, you can exercise you
hamster in the plastic
ball for 2 - 3 times a day.