(under subclass 51) Subject matter wherein the muscle conditioning or developing apparatus is a movable surface, e.g., a roller, endless belt, etc., upon which the user may walk or run while remaining in essentially the same location relative to a fixed supporting surface, e.g., a floor, etc.
SEE OR SEARCH CLASS
472, Amusement Devices, particularly
48, for an amusement walkway or passageway having a movable floor or stair step and subclasses 90+ for a surface for a skiing or a skating vehicle, e.g., for skis, ice or roller skates, etc., including a sloped treadmill used to imitate a ski slope.
