This study examines conflict among heterosexual mixed-weight (i.e., one overweight and one healthy weight partner) and matched-weight couples (N = 43 couples). Participant sex, eating together, partner health support, and negative partner influence were examined as moderators of the association between weight status and conflict. Using dyadic models, we found that mixed-weight couples, specifically couples including overweight women and healthy weight men, reported greater conflict both generally and on a daily basis, compared to matched-weight couples; however, general conflict was reduced with greater perceived support from the partner. Mixed-weight couples who reported eating together more frequently also reported greater general conflict. These findings suggest that mixed-weight couples may experience more conflict than matched-weight couples, but perceived support from the partner can buffer this conflict. This research suggests that interpersonal dynamics associated with mixed-weight status might be important for romantic partners’ relational and personal health.
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