Abstract: Objective: RPE, cardiopulmonary state and emotional state of different time buckets of moderate intensity fixed speed exercise were explored.Methods: The sixty subjects completed successively 30 minutes jogging(or walk) with fixed appropriate running speed of moderate intensity (subjects had showed appropriate running speed during previous experiment with adjusted speed by themselves) on treadmill, and subjects evaluated their RPE(rating of perceived exertion)and emotional states by themselves before 5 min, during 30 min and after 10 min, and physiological indicators were monitored synchronously. 45 min were divided into nine time buckets, and emotional and physiological state data of six time buckets (t₁, t₂, t₃, t₄, t₅ and t₆) during exercise were counted and analyzed.Results: of interview to verify were taken into account.Results: RPE, minimum value appeared during t₃, t₄ and maximum value appeared during t₁, t₆; HR, maximum value appeared during t6; VO₂, VO₂/kg, MET, essentially constant; positive emotional state, best value appeared during t₂, t₃, t₄, t₅ and worst value appeared during t₆; negative emotional state, worst value appeared during t₆ and t₅ followed.Conclusion: Cardiopulmonary activity status changed and RPE changed were inconsistent during moderate intensity fixed speed exercise, and in a state of positive emotion with RPE undervalued in HR phenomenon. Therefore, the influence of the third variable (emotional state) should be taken into account when RPE as indicator of moderate exercise intensity. A quarter of the participants into a kind of halcyon ego state during exercise.

Key words: Exercise, Different Time Bucket, RPE, Cardiopulmonary State, Emotional State