EFFECTS OF FINE PARTICLES POLLUTION UNDER DIFFERENT TRAINING LOADS ON THE CARDIOPULMONARY FUNCTION OF LONG-DISTANCE RUNNERS

In this paper, we took 60 long-distance runners from a sports college in a certain region of China as experimental subjects, and conducted a systematic study on the effect of fine particulate pollution on the cardiopulmonary function of long-distance runners under different training loads. The 60 long-distance runners were divided into 3 groups, namely the high load training group, the medium-load training group and the low-load training group. The portable aerosol monitor was used to monitor the PM2.5 mass concentration value during the experiment, and the FHL-II spirometer and the German CORTEX cardiopulmonary function test system were used to test the cardiopulmonary function indexes of the three groups of long-distance runners. Experiments have proved that under high-concentration PM2.5 exposure environment, the cardiopulmonary function indexes of VC, FVC, PEP/LVET and SV/DT in the high-load training group were significantly lower than those in the medium-load training group and low-load training group (P<0.05). Athletes in the high-load training group will experience weakening of small airway function and a significant decrease in myocardial contractility. Under the medium concentration PM2.5 exposure environment, the PEF and FEF50 of the high and medium load training group were significantly lower than those of the low load training group (P<0.05, P<0.01). Under the low concentration PM2.5 exposure environment, there was no significant difference in the lung function indexes of the three groups of athletes (P>0.05). In summary, the higher the concentration of fine particulate matter and the greater the training load, the greater the impact on the cardiopulmonary function of long-distance runners.