A seat comprising: a seat body including a seat back and a seat cushion (S 1); a plurality of pressure sensors provided under an outer covering of the seat cushion (S 1) and an outer covering of the seat back and configured to acquire measurement values for specifying a state of physical motion of an occupant seated on the seat body; and a controller connected to the plurality of pressure sensors and thereby allowed to acquire the measurement values from the plurality of pressure sensors, the controller being configured to be capable of communicating with other equipment, wherein the controller comprises: an evaluation unit configured to compute an evaluation value on the state of physical motion of the occupant, the evaluation value being computed based on the measurement values; an evaluation value presentation unit configured to present the evaluation value at a terminal to be used by the occupant; a shared data acquisition unit configured to acquire an other-occupant evaluation value that is an evaluation value on a state of physical motion of another person, acquired either by the evaluation unit or from another seat; and a shared data presentation unit configured to present the other-occupant evaluation value at the terminal to be used by the occupant, wherein the controller is configured to execute a training program for training the occupant: presentation of a difference between each of the measurement values acquired by the plurality of pressure sensors and its ideal value; computation of the evaluation value by the evaluation unit based on the measurement values acquired by the plurality of pressure sensors, and presentation of the evaluation value by the evaluation value presentation unit at the terminal being used by the occupant, and wherein, during or after execution of the training program, the controller acquires the other-occupant evaluation value by the shared data acquisition unit, and presents the other-occupant evaluation value by the shared data presentation unit at the terminal being used by the occupant. a seat body including a seat back and a seat cushion (S 1); a plurality of pressure sensors provided under an outer covering of the seat cushion (S 1) and an outer covering of the seat back and configured to acquire measurement values for specifying a state of physical motion of an occupant seated on the seat body; and a controller connected to the plurality of pressure sensors and thereby allowed to acquire the measurement values from the plurality of pressure sensors, the controller being configured to be capable of communicating with other equipment, wherein the controller comprises: an evaluation unit configured to compute an evaluation value on the state of physical motion of the occupant, the evaluation value being computed based on the measurement values; an evaluation value presentation unit configured to present the evaluation value at a terminal to be used by the occupant; a shared data acquisition unit configured to acquire an other-occupant evaluation value that is an evaluation value on a state of physical motion of another person, acquired either by the evaluation unit or from another seat; and a shared data presentation unit configured to present the other-occupant evaluation value at the terminal to be used by the occupant, an evaluation unit configured to compute an evaluation value on the state of physical motion of the occupant, the evaluation value being computed based on the measurement values; an evaluation value presentation unit configured to present the evaluation value at a terminal to be used by the occupant; a shared data acquisition unit configured to acquire an other-occupant evaluation value that is an evaluation value on a state of physical motion of another person, acquired either by the evaluation unit or from another seat; and a shared data presentation unit configured to present the other-occupant evaluation value at the terminal to be used by the occupant, wherein the controller is configured to execute a training program for training the occupant: presentation of a difference between each of the measurement values acquired by the plurality of pressure sensors and its ideal value; computation of the evaluation value by the evaluation unit based on the measurement values acquired by the plurality of pressure sensors, and presentation of the evaluation value by the evaluation value presentation unit at the terminal being used by the occupant, and wherein, during or after execution of the training program, the controller acquires the other-occupant evaluation value by the shared data acquisition unit, and presents the other-occupant evaluation value by the shared data presentation unit at the terminal being used by the occupant. presentation of a difference between each of the measurement values acquired by the plurality of pressure sensors and its ideal value; computation of the evaluation value by the evaluation unit based on the measurement values acquired by the plurality of pressure sensors, and presentation of the evaluation value by the evaluation value presentation unit at the terminal being used by the occupant, and wherein, during or after execution of the training program, the controller acquires the other-occupant evaluation value by the shared data acquisition unit, and presents the other-occupant evaluation value by the shared data presentation unit at the terminal being used by the occupant.