1. A cardiac pacemaker for implantation within a subject, the pacemaker comprising:
at least one motion sensor configured to detect movement of the subject and produce output indicative of the movement; and
at least one processor in the housing, the at least one processor being responsive to the output from the sensor and configured
to produce a pacing signal when the output from the at least one motion sensor indicates the subject is at rest, the pacing
signal being configured to increase a heart rate of the subject above a resting heart rate level, wherein the pacing signal
is configured to stimulate remodeling of the subject's heart muscle.