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An exercise therapy device enables a physically handicapped or aged person to smoothly and continuously perform a pedaling exercise according to the level of his physical strength without overextending himself or herself when he or she undergoes an exercise therapy, to thereby recover his or her exe

An exercise therapy device enables a physically handicapped or aged person to smoothly and continuously perform a pedaling exercise according to the level of his physical strength without overextending himself or herself when he or she undergoes an exercise therapy, to thereby recover his or her exercise function and maintain his or her physical strength. The device is simple in construction, compact in size, light in weight, and can be manufactured at low cost by using only a single actuator which acts as both a load device and an assisting force generating device. The device comprises a drive portion adapted to be manually moved by an exerciser, an actuator connected to the drive portion through a power transmission mechanism, and a control unit for causing the actuator to operate as a load device for providing a load to the drive portion and as an assisting device for providing an assisting force to the drive portion when the drive portion is manually moved by the exerciser.

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1. An exercise therapy device comprising:a drive portion manually moved by an exercising person; a power transmission mechanism; a single actuator operably linked to said drive portion through said power transmission mechanism; and a control unit for controlling said single actuator to operate alter

1. An exercise therapy device comprising:a drive portion manually moved by an exercising person; a power transmission mechanism; a single actuator operably linked to said drive portion through said power transmission mechanism; and a control unit for controlling said single actuator to operate alternatively as a, load device providing a load to said drive portion for resisting a force applied by the exercising person in manually moving said drive portion and as an assisting device providing an assisting force to said drive portion assisting a force applied by the exercising person in manually moving said drive portion, said control unit controlling said actuator to provide the assisting force in a range of positions and. rotational angles of said drive portion, determined by said control unit, at which mechanical friction of said drive portion exceeds force that can be manually applied to said drive portion by the exercising person.