Health education on healthy nutrition and regular physical activity based on the transtheoretic model was given to overweight university students in the experimental group once a week (every 4 weeks) using the online education method.

No attempt was made to the students in the control group during the intervention process. When the intervention process of the experimental group was finished, the materials used in health education were shared with the students.

An announcement was made by visiting all the faculties at Nuh Naci Yazgan University, stating the content of the research and the duration of the research. Among the volunteer students, students who met the inclusion criteria were included in the study. Afterwards, the students were assigned to the groups by the statistician using a simple randomization method. As a result of the pre-test, it was determined which change stage each student was in according to the Transtheoretic model (TTM). The students were not given information about which group they were in and what stage they were in according to TTM. Health education was given to university students once a week by online education method and it took 4 weeks-30 days to complete the research. The average duration of the health education given to each student is 30-45 minutes. When the training process was over, the post-test questions were sent to the students by the online survey method.

The stages of change of the transtheoretic model were measured before and after the intervention to determine that university students changed their unhealthy diet and insufficient physical activity behaviors.