A rocking-type exercise device includes a seat on which a user can sits, a seat rocking unit for reciprocating the seat at least in one direction, a control unit for controlling the seat rocking unit so as to reciprocate the seat, and a detector unit for detecting a user’s exercise posture to obtain detected information. The battery module enclosure defines a compartment for receiving a battery module and a NID enclosure that serves to protect NID circuitry, network terminals, and subscriber terminals from environmental conditions and security threats. Each pad being easily removable after use, through suitable openings in the shell, leaving behind a clean pad in its place for subsequent use and removal.