In recent years, there has been a phenomenal proliferation of multifunctional fitness apps (MFAs), many of which are deeply ingrained into modern daily life as an aid to trace, manage, and improve users’ health and fitness. With technological advancement, these emerging information technology (IT) artifacts have the potential to facilitate the sustainable development of society and the environment. However, MFAs are facing a critical predicament: how to ensure user stickiness and continuous use. Drawing on the social support theory, this study aims to investigate stickiness as a multi-dimensional construct and to explore the antecedents of continuance usage and continuance purchase intentions in MFAs. The research model is empirically tested with data collected from 328 users of mobile fitness apps. A structural equation modeling analysis reveals both instrumental stickiness and social stickiness exert statistically significant influences on continuance usage intentions and in-app purchase intentions. Appraisal support, information support, and network support are significant antecedents for instrumental stickiness. While emotion support, esteem support, network support, and tangible support are significant antecedents for social stickiness. In addition, two facets of user sustainability—instrumental stickiness and social stickiness—exert different levels of influence on continuance usage and continuance app purchase intensions, respectively. The findings of this study will provide valuable insights for practitioners and policymakers involved in designing sustainable health products and engendering e-health systems.
A higher number of socially anxious users were found as more users joined social network sites. Since social commerce has become an important issue, this study investigated the effect of social anxiety on online users’ social commerce intention. Online social interactions are hypothesized to influence social commerce intention directly or indirectly through online social support. 427 effective samples were collected from Facebook users, and the results confirmed most of the causal effects. The study also tested the moderating effect of social anxiety on the causal effects. Of the eight relationships, social anxiety significantly moderates six of them. The relationships between online social interaction and emotional support and between online social interaction and social commerce intention are stronger for users with higher social anxiety. For users with lower social anxiety, the relationship between social support and the receiving of social commerce intention is stronger. The research findings lead to significant theoretical contributions and managerial implications.
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