Objective:Explored the causal relationship between undergraduates'internet addiction and physical activity in school used the cross-lagged research design of longitudinal study.Methods:Used the Diagnostic Scale for Internet Addiction Disorder(DSFIAD),and International Physical Activity Questionnaire-Short Form(IPAQ-SF),this paper made a four months,two-stage follow-up investigation on 604 undergraduates(53.81%boys;M±SD=19.33±1.974 years)from 8 universities in Shanghai.Results:The gender difference in undergraduates'internet addiction was not significant,while,the gender difference in their physical activity was significant(male was better than female).Moreover,between internet addicts and non-internet addicts,there was also significant difference in undergraduates'physical activity level in school(addicts were lower than non-addicts).There was a trans-temporal-stable significant negative correlation between undergraduates'internet addiction and physical activity in school(P<0.01).The cross-lagged analysis revealed that,for undergraduates,the significant negative effects,the internet addiction of test-1 on the physical activity of test-2(P<0.001),and the physical activity of test-1 on the internet addiction of test-2(P<0.05).Moreover,the influence effect of the former was greater than that of the latter.Conclusion:There are differences such as gender,internet addicts and non-addicts in undergraduates'school physical activity.There is a causal relationship between undergraduates'internet addiction and physical activity in school.Among them,the internet addiction is the cause variable of undergraduates'physical activity in school.Moreover,the influence of internet addiction on undergraduates'physical activities in school have the characteristics of gender consistency.To a certain extent,the construction of the cross-lagged model explained the internal relationship between internet addiction and undergraduates'physical activity in school,and it could provide some reference for improving the level of physical activity for undergraduate.
undergraduateinternet addictionphysical activity in schoolcross-lagged analysis