媒介的传播效果在网络化时代对老年人的再社会化进程起着关键作用，同时体育锻炼是预测老年人再社会化的重要指标，国内鲜有基于全国样本的数据分析互联网使用对老年人体育锻炼的影响。 研究利用中国综合社会调查(CGSS)2017年数据，基于再社会化理论，运用logistic模型、倾向得分匹配、 赫克曼模型探究互联网使用对老年人体育锻炼的影响。结果发现：互联网使用对老年人的锻炼频率和锻炼强度都具有显著的促进作用，其中对锻炼强度的影响更大；中介机制分析表明，互联网使用主要通过影响学习状况来促进老年人的体育锻炼；异质性分析显示，互联网使用对老年人锻炼的促进作用在低龄老年人、城市户籍老年人以及东部地区老年人中更为明显。以上结果运用倾向得分匹配法及赫克曼模型控制了样本的内生性问题，同时通过了稳健性检验，表明互联网使用能够加强老年人的学习行为， 从而促进其参与体育锻炼，有助于加快老年人的再社会化进程。

The communication effect of media plays a key role in the resocialization process of the elderly in the Internet age， and physical exercise is an important index to predict the resocialization of the elderly. In China，there are few data based on the national sample to analyze the impact of internet use on the physical exercise of the elderly. Based on the CGSS2017 survey data and the resocialization theory，this paper uses logistic model，tendency score matching，and Heckman model to explore the inflfluence of internet use on physical exercise of the elderly. The results show that internet use had a signifificant effect on the exercise frequency and intensity of the elderly，and the inflfluence on the exercise intensity was more signifificant. The mediating mechanism analysis suggests that internet use promoted physical exercise in the elderly mainly by inflfluencing learning status； The heterogeneity analysis indicates that the promotion effect of internet use on elderly exercise was more obvious in the younger elderly，the elderly with urban residence and the elderly in the eastern region. The above results used the propensity score matching method and the Heckman model to control the endogeneity of the sample，and passed the robustness test，indicating that the internet use can strengthen the learning behavior of the elderly，promote their participation in physical exercise，and accelerate the resocialization process of the elderly.

G812.48

国家社会科学基金青年项目(20CTY019)