Abstract: An exercise promotion system includes a work environment providing device configured to provide a work environment for improving efficiency of work of a user, an exercise state detection unit configured to detect an exercise state of the user's lower limb, and a work environment change unit configured to change the work environment provided by the work environment providing device. The work environment change unit changes the work environment so that the work environment deteriorates when the exercise state detected by the working state detection unit does not meet a predetermined reference.

Abstract: A body shape management system includes: an avatar output unit configured to post an avatar representing a future body shape of a first user in a chat room in association with a message posted by the first user in the chat room, the future body shape of the first user being his/her body shape expected after a lapse of a set period; an extraction unit configured to extract a message containing a predetermined content from a message posted for the first user by a second user different from the first user; and an avatar adjustment unit configured to change the future body shape of the avatar of the first user according to the content of the message extracted by the extraction unit.