Decked out in CHiPS sunglasses, a Studio 54 black glitter tank and a pair of O.J. Simpson lifting gloves, Paris Hilton worked up an heiress sweat as she attempted to ride a bike on Thursday. Easy does it, P.

With her stint at the Prison Hilton set to begin in less than a month, the probation violator has been trying to get into fighting shape.

You're gonna need more than a pedicure when you go toe-to-toe with Mama Morton!