Abstract: Objective: To investigate the application of precision-guided intervention model on exercise promotion in patients with Gestational Diabetes Mellitus (GDM). Methods: A table of random numbers was used to randomly divide 82 patients with GDM who received regular prenatal care in a obstetrics and gynecology hospital in Hangzhou from May to September 2020 into control group (n=42) and experiment group (n=40). Patients in the control group received standard care while the experiment group received precise guidance intervention model for five weeks in addition to standard care. Patients in both groups wore the fitness tracker continuously. Scores of the Pregnancy Exercise Self-Efficacy Scale, Pregnancy Physical Activity Questionnaire, and physical activity level monitoring by AX3 fitness tracker were compared before and after the intervention for both groups. Results: The score of Pregnancy Exercise Self-Efficacy Scale, the amount of time doing Moderate-to-Vigorous intensity Physical Activity (MVPA), the amount of time exercising, and the amount of time doing house chores during pregnancy were all higher in the experiment group than those in the control group, while the amount of time of prolonged sitting was less in the control group than in the experiment group, and the differences were statistically significant (P<0.05); the amount of time doing MVPA monitored by AX3 fitness tracker was higher in the experiment group than that in the control group, and the difference was statistically significant (P<0.05). Conclusion: The precise-guided intervention model can help patients with GDM improve their exercise self-efficacy during pregnancy, increase the amount of time doing MVPA during pregnancy, and promote the diversities of exercise during pregnancy in patients with GDM.

Key words: fitness tracker; precision; Gestational Diabetes Mellitus; exercise therapy