当训练伙伴是虚拟的：AI代理与人类同伴在长期身体活动研究中的应用
When Workout Buddies Are Virtual: AI Agents and Human Peers in a Longitudinal Physical Activity Study
中文总结 AI 辅助
本文研究了AI代理与人类同伴在长期身体活动中的影响，发现AI能提供更稳定的鼓励，而人类同伴则增强社会存在感，两者互补促进持续锻炼。
中文摘要 AI 辅助
身体不活动仍然是全球健康问题的关键，但可持续激励的可扩展策略却十分匮乏。设计为模拟锻炼同伴（SEPs）的对话代理代表了一种有前途的替代方案，但其长期影响尚不明确。我们报告了一项为期六个月的随机对照试验（N=280），比较了单独锻炼、与人类同伴一起锻炼或与大型语言模型驱动的SEP一起锻炼的个体。结果显示了一个伙伴关系悖论：人类同伴引发了更强的社会存在感，而AI同伴提供了更稳定的鼓励和更可靠的协作关系。人类通过真实的比较和问责来激励，而AI同伴则培养了一致且低风险的支持。这些互补的优势表明，AI代理不应模仿人类的真实性，而应通过可靠性来增强它。我们的发现推进了人机交互研究，并指出了混合设计，其中人类存在和AI一致性共同维持身体活动。
英文摘要
Physical inactivity remains a critical global health issue, yet scalable strategies for sustained motivation are scarce. Conversational agents designed as simulated exercising peers (SEPs) represent a promising alternative, but their long-term impact is unclear. We report a six-month randomized controlled trial (N=280) comparing individuals exercising alone, with a human peer, or with a large language model-driven SEP. Results revealed a partnership paradox: human peers evoked stronger social presence, while AI peers provided steadier encouragement and more reliable working alliances. Humans motivated through authentic comparison and accountability, whereas AI peers fostered consistent, low-stakes support. These complementary strengths suggest that AI agents should not mimic human authenticity but augment it with reliability. Our findings advance human-agent interaction research and point to hybrid designs where human presence and AI consistency jointly sustain physical activity.
