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Updated: Jan 14, 2026
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Development and Efficacy Testing of a Social Network-Based Competitive Application for Weight Loss
Jisan Lee1,2, Jeongeun Kim1,2,3
11 College of Nursing, Seoul National University , Seoul, Republic of Korea.
Summary
A new smartphone app, With U, successfully boosted weight loss motivation and results by leveraging social networks. Closer relationships among participants enhanced weight loss outcomes, highlighting the power of social support in health interventions.
Area of Science:
- Health Informatics
- Behavioral Science
- Public Health
Background:
- Global obesity rates remain high, indicating a need for novel weight management interventions.
- Traditional weight loss methods often have limited long-term success, necessitating innovative approaches.
Purpose of the Study:
- To evaluate the effectiveness of a smartphone application, With U, in aiding weight loss.
- To explore the impact of social networks (offline and online) on weight loss interventions.
Main Methods:
- A one-group pretest-posttest design was employed.
- Participants (20-40 years old) and their friends used the With U app for 4 weeks.
- Weight loss, motivation, and physical characteristics were measured using questionnaires and body composition analysis.
Main Results:
- The With U application significantly improved motivation and the amount of weight lost.
- Positive trends were observed in physical characteristics beyond weight loss.
- Closer and more direct relationships among participants correlated with greater weight loss.
Conclusions:
- The With U smartphone application effectively enhanced weight loss motivation and outcomes.
- Social network integration in health management apps shows promise for future interventions.
- Further research is needed to explore the long-term effects of social network-based health applications.
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