Background   The western region in China has a vast plateau with abundant resources and numerous ethnic groups. It is urgent that troops need to be stationed for defense. However, affected by the special geographical environment and climatic factors of the plateau, a series of changes will occur in the individual's physiology and psychology.

  Objective   To observe the dynamic changes of blood lipid, blood glucose indexes and mood states of soldiers over time in plateau and investigate the correlation between them, so as to guarantee the health of soldiers stationed on plateau.

  Methods   From November 2019 to April 2021, we recruited 150 soldiers who were trained in the western region with altitude of 4000 meters. Their blood biochemical examination and questionnaires were carried out at the third month, the sixth month, and the first year of their plateau training, data were collected for correlation analysis.

  Results   The abnormal rate of HbA1c was 14.7 % during the period of soldiers stationed in plateau, and it decreased significantly with the prolongation of time on the plateau (P<0.05). The serum TG concentration of armed police soldiers significantly increased with the extension of training time on the plateau, while the HbA1c concentration significantly decreased (P<0.05). The concentration of HDL-C and LDL-C decreased at 6 months compared with that of 3 months of altitude training on the plateau, while it significantly increased at 1 year of altitude training (P<0.05). The negative emotions of armed police soldiers increased with the prolongation of altitude training (P<0.05), and the positive emotions fluctuated. Compared with the normal HbA1c group, the scores of tension, anger, fatigue, depression, panic, negative mood and mood states in the high HbA1c group increased significantly, and the scores of energy, self-esteem and positive mood decreased at 6 months on the plateau (P<0.05). Further correlation analysis showed that the concentration of TG, TC and LDL-C were positively correlated with tension, anger, fatigue, depression, panic, and negative mood, and negatively correlated with energy and self-esteem (P<0.05).

  Conclusion   The serum TG of armed police soldiers increases significantly with the prolongation of training time on the plateau, while the HbA1c level is on the contrary. HDL-C and LDL-C decrease first and then increase. The negative mood of nervousness, anger, fatigue, depression and panic increase with the prolongation of training time. The positive mood of energy and self-esteem gradually increase until the sixth month on the plateau, and then decrease significantly. Moreover, the serum TG, TC and LDL-C levels of armed police soldiers are positively correlated with negative emotions, and negatively correlated with positive emotions.