Conclusions
The remote smartphone-based dietary and physical activity interventions helped older people with overweight and obesity reduce their intake of total dietary energy but did not significantly improve their physical activity. They had a better effect on weight control and improved blood pressure, blood glucose, and blood lipids. This study preliminarily confirmed the feasibility and effectiveness of the remote management mode of “health information collection—health assessment—guidance and feedback—follow-up” in the older population. It is recommended that this remote smartphone-based dietary and physical activity intervention pattern be further applied to promote health management in the older population.This research was funded by the Yingdong Intelligent Technology Co, Ltd (grant 2018-1). Yingdong Intelligent Technology (Shandong) Co, Ltd, was not involved in the design of the study; data collection, analysis, or interpretation; writing or editing of the manuscript; or the decision to submit the manuscript for publication.Authors' Contributions: GM contributed to conceptualization. GM and NZ contributed to methodology. NZ and MZ contributed to formal analysis. NZ, ML, and MZ contributed to investigation. NZ, ML, and MZ contributed to data curation. NZ, ML, and MZ contributed to writing—original draft preparation. GM contributed to writing—review and editing. NZ contributed to visualization. GM contributed to supervision. NZ, ML, and MZ contributed to project administration. GM contributed to funding acquisition. All the authors have read and agreed to the published version of the manuscript.Conflicts of Interest: None declared.CONSORT eHEALTH Checklist (V 1.6.1).