Relationship partners affect one another’s health outcomes through their health behaviors, yet how this occurs is not well understood. To fill this gap, we present the Dyadic Health Influence Model (DHIM). The DHIM identifies three routes through which a person (the agent) can impact the health beliefs and behavior of their partner (the target). An agent may (a) model health behaviors and shape the shared environment, (b) enact behaviors that promote their relationship, and/or (c) employ strategies to intentionally influence the target’s health behavior. A central premise of the DHIM is that agents act based on their beliefs about their partner’s health and their relationship. In turn, their actions have consequences not only for targets’ health behavior but also for their relationship. We review theoretical and empirical research that provides initial support for the routes and offer testable predictions at the intersection of health behavior change research and relationship science.

关系伙伴通过他们的健康行为影响彼此的健康结果，但如何发生这种情况尚不清楚。为了填补这一空白，我们提出了二元健康影响模型 (DHIM)。DHIM 确定了个人（代理人）可以影响其伴侣（目标）的健康信念和行为的三种途径。代理人可以 (a) 塑造健康行为并塑造共享环境，(b) 制定促进他们关系的行为，和/或 (c) 采用策略来有意影响目标的健康行为。DHIM 的一个核心前提是代理人根据他们对伴侣健康和他们的关系。反过来，他们的行为不仅会对目标的健康行为产生影响，还会对他们的关系产生影响。我们回顾了为路径提供初步支持的理论和实证研究，并在健康行为改变研究和关系科学的交叉点提供可测试的预测。