We examined the monthly changes of mental stress indices and lifestyle factors in elementary school students, and examined the relationship between whether or not they took junior high school entrance examination. The survey subjects were 67 sixth-grade elementary school students, and a total of eight surveys were conducted, once in each month. The survey method was a self-administered questionnaire survey, and the contents of the survey were basic information (age, gender, sleep time), “stress”, “exercise”, “sleep”, and “diet”. As a result of this study, it was revealed that there were more children who felt mental stress in the examinee group than in the non-examinee group, and that the timing was higher until around November, when the examinee school was decided. In addition, it was inferred that the examinee group had fewer opportunities to exercise than that of the non-examinee group over a long period of time. In the examinee group where many children felt mental stress, a significant positive correlation between stress and exercise index was observed. These results suggest that the students in the upper grades of elementary school had fewer opportunities to exercise in the junior high school entrance examination group than that of non-examinee group, and that many of them felt more stressed at the time of deciding which school to take the examination than just before the examination.
