Influence of Green&Blue Visual Field Exposure in Combination with Exercise on Positive and Negative Affect-a Feld RCT and Cross-over Study

INTERVENTION: Group A: green space exercise group:After the intervention in the green open space, the subjects took the intervention in the green open space again at an interval of more than 10 days;Group B: Blue‐building space exercise group:After the intervention in the blue open space, the subjects took the intervention in the blue open space again at an interval of more than 10 days;Group C: green‐blue space exercise group:After the intervention in the green‐blue balanced open space, the subjects took the intervention in the green‐blue balanced open space again at an interval of more than 10 days; CONDITION: Non communicable diseases PRIMARY OUTCOME: blood pressure;Heart rate variability;Positive and negative emotions; INCLUSION CRITERIA: 1. Due to the needs of the study, the participants are mainly teachers, lawyers, doctors, researchers, white‐collar workers and other mental workers; For the living address and workplace of the subjects, it is required that they should not be near the test site, and they seldom or almost never go to the test site; 2. The health requirements for the subjects are: no color blindness (on‐site screening is required before collecting samples), no confirmed chronic non communicable diseases and other diseases, no medical advice to restrict physical exercise, healthy body, normal limb mobility, and no recent physical health abnormalities; 3. In addition, the tester also needs to meet the PAR‐Q questionnaire's criteria for allowing participation in the test.