Abstract: A conveyor chain which is designed to be used on a stepmill to form into steps on the side interacting with a user, and a stair climbing exercise device or “stairmill,” having a belt formed thereon. The belt being formed from a plurality of interconnected L-shaped elements each of the L-shaped elements having unequal arm and leg dimensions.

Abstract: Treadmills or similar exercise devices which utilize a motor driven belt which can be used to provide a powered running surface, but can also be used to provide a resistance to movement of the belt to allow a user to have to manually drive the belt at a constant resistance or torque regardless of incline. This later mode of operation is akin to the pushing or pulling of a weight sled and can be arranged so that a user can be required to supply a constant torque over a range of inclines.