Physiological and psychological reactions, immediate relaxation and continuous relaxation.

1. Physiological and psychological reactions: Relaxation reactions can be divided into physiological reactions and psychological reactions. Physiological reactions include changes in physiological indicators such as heart rate, breathing, and muscle tension, while psychological reactions include emotions, cognitive processes, etc. changes in knowledge and behavior.

2. Instant relaxation and sustained relaxation: Immediate relaxation refers to the relaxation reaction that occurs immediately during activities such as listening to music, while sustained relaxation refers to the relaxation effect that continues after the music ends.