(Department of Physical Education,Donghua University,Shanghai 200051,China) Abstract: In order to explore the latent causal relationship between the family function, environmental sensitivity and the adolescents' home physical activity in junior high school. Then used the cross-lagged research design, and used the family function scale for adolescents, the environmental sensitivity scale, and the international physical activity questionnaire-short form, this paper conducted an eight-week, two-stage follow-up investigation on 607 adolescents in the junior high school. The research shows that for adolescents in the junior high school, the family functioning had a significant gender difference (P<0.01), and the effect sizes of gender difference for the twice test were 0.139 (d=0.282) and 0.119 (d=0.240), respectively. And their home physical activity had also a significant gender difference (P<0.001), and the effect sizes of gender difference for the twice test were 0.233 (d=0.478) and 0.183 (d=0.372), respectively, While the gender difference of their environmental sensitivity was not significant (P>0.05). The family function, environmental sensitivity and the adolescents' home physical activity in junior high school had the stable correlation and synchronization correlation across 8 weeks. The cross-lagged analysis revealed that the family function and environmental sensitivity could all predict the adolescents' home physical activity in junior high school after 8 weeks. Moreover, in the influence on their family function and home physical activity, the environmental sensitivity had a mediating effect, and the mediating effect sizes of the twice test were 12.45% and 12.51%, respectively. The study holds that for adolescents in the junior high school, female could perceive more family function than male, while male home physical activity will be better than the female. The family function and environmental sensitivity can all affect the adolescents' home physical activity in junior high school. Moreover, the family function could affect their home physical activity through environmental sensitivity. Keywords: adolescents;family function;environmental sensitivity;home physical activity;cross-lagged analysis |