PROBLEM TO BE SOLVED: To provide a feedback method, a system, and a program for feed backing a current exercise condition and a psychological condition with respect to a reference exercise condition and a psychological condition to a subject.SOLUTION: A feedback method for an exercise condition and a psychological condition is configured to: determine an exercise condition and a psychological condition of a primary subject on the basis of primary biological information acquired from a primary subject who is taking exercise determine an exercise condition and a psychological condition of a secondary subject on the basis of secondary biological information acquired from a secondary subject who is taking exercise. The secondary biological information is information acquired from a position of the secondary subject corresponding to a position of the primary subject where the primary biological information is acquired and is same kind information to the primary biological information. The primary biological information and secondary biological information contain, myoelectric potential data and cardiac potential data. The feedback method compares the exercise conditions and psychological conditions of the primary subject and secondary subject, determines presence/absence of relevancy of the psychological condition of the secondary subject to the exercise condition, and if presence of the relevancy is determined, outputs a feedback signal containing a notification indicating a fact that, the psychological condition is related to the exercise condition.SELECTED DRAWING: Figure 6A
