Abstract: An adjustable seat for a riding device includes a frame adapted to be attached to the riding device. A saddle has an underside and a fastening mechanism is attached to the underside of the saddle. A spring seat is attached to the frame. A removable compression spring is positioned between the fastening mechanism and the spring seat. The fastening mechanism is adjustable so that a compression of the spring between the fastening mechanism and the spring seat may be adjusted.

Abstract: A spotting device for use during exercise routines is provided where a linear motor includes a forcer that travels along a magnetic shaft to provide a resistance force in response to a force generated by a weight in order to provide assistance and safety to a user performing the exercise routine.

Abstract: A spotting device for use during exercise routines is provided where a lineal motor includes a forcer that travels along a magnetic shaft to provide a resistance force in response to a force generated by a weight in order to provide assistance and safely to a user performing the exercise routine.

Abstract: Exercise machines and linear motor systems for use in exercise machines are provided herein, where the linear motor provides a resistance force in response to a force generated by a user performing an exercise. The linear motor systems include a programmable logic and force generation control system, which is programmable to control the resistance provided by the linear motor.

Abstract: Exercise machines and linear motor systems for use in exercise machines are provided herein, where the linear motor provides a resistance force in response to a force generated by a user performing an exercise. The linear motor systems include a programmable logic and force generation control system, which is programmable to control the resistance provided by the linear motor.

Abstract: A compression wave spring assembly including a base and a compression spring with three wave regions that are formed from a continuous elongate flat wire strip. The first wave region begins at one end of the spring with a terminal wave. The waves of the first wave region have a constant amplitude. The second wave region is positioned adjacent to the first wave region. The wave amplitude of the second wave region varies from the first wave amplitude to zero. The third wave region begins where the second wave amplitude reaches zero. The third wave region includes a zero amplitude thereby forming a flat circular shim end. The base assembly includes a recess that receives and supports the terminal wave at the non-shimmed end of the spring.