A method of rehabilitation using an actuator type that includes a movement mechanism capable of applying a force that interacts with a motion of a patient's limb in a volume of at least 30 cm in diameter, in at least three degrees of freedom of motion of the actuator and capable of preventing substantial motion in any point in any direction in said volume, comprising: exercising a patient at a first place of rehabilitation selected from a bed, a wheel-chair, a clinic and a home, using an actuator of said actuator type which interacts with a motion of said patient; and second exercising said patient at a second place of rehabilitation selected from a bed, a wheel-chair, a clinic and a home using a second actuator of said actuator type which interacts with a motion of said patient; wherein said first exercising and said second exercising utilize a same movement mechanism design for moving the actuators.