Green authenticity and resident subjective wellbeing: large-scale sport events as social interventions for public health.

Background: Subjective wellbeing is a core public health priority. Previous research overlooked the impact of large-scale sport events on improving subjective wellbeing among host residents. Grounded in Service-Dominant Logic, this study investigated how residents' perceptions of green initiative authenticity and green value congruence influence subjective wellbeing. Methods: Using a cross-sectional survey, 823 valid responses were collected during the 2023 Hangzhou Asian Games, with data analyzed via Partial Least Square Structural Equation Modeling. Results: Results show that residents' perceptions of green initiative authenticity and green value congruence positively predicted value co-creation, which in turn enhanced subjective wellbeing. Value co-creation fully mediated the relationship between perceived authenticity and subjective wellbeing, while it partially mediated the association between value congruence and subjective wellbeing. Conclusion: This study extends Service-Dominant Logic application to passive residents, enriches sport event Social Leverage Theory, and provides actionable insights for organizers to design authentic, community-aligned green initiatives. Therefore, large-scale sport events as viable public health interventions can enhance sustainability and community wellbeing by fostering inclusive value co-creation.