An exercise apparatus used to simulate skating or roller blading movement in a user includes a pair of sleds or shuttles which include a pedal adapted to support the foot of a user standing thereon. The shuttles are movable along a respective guide assembly consisting of one or more rails which curve...http://www.google.ca/patents/US6786850?utm_source=gb-gplus-sharePatent US6786850 - Exercise apparatus for simulating skating movement
