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Extraction and Analysis of Cortisol from Human and Monkey Hair
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Adult adiposity linked to relationship hostility for low-cortisol reactors
Katherine R Thorson1, Michael F Lorber2, Amy M Smith Slep2
1Department of Psychology, New York University.
Summary
Relationship hostility is linked to obesity, but only in individuals with low biological stress responses. This suggests cortisol reactivity may influence the connection between relationship conflict and weight gain.
Area of Science:
- Psychology
- Endocrinology
- Health Sciences
Background:
- Previous studies show inconsistent links between relationship hostility and adiposity.
- Biological responses to relationship stress may play a role in this association.
Purpose of the Study:
- To examine if cortisol reactivity moderates the relationship between hostility in intimate relationships and adiposity.
- To understand the biological mechanisms underlying the link between relationship conflict and obesity.
Main Methods:
- 117 cohabiting couples participated in conflict interactions.
- Salivary cortisol levels were measured before and after conflict discussions.
- Cortisol reactivity was assessed in relation to relationship hostility and body fat.
Main Results:
- A significant association was found between relationship hostility and adiposity.
- This association was primarily observed in individuals with lower cortisol reactivity to couple conflict.
- Low cortisol reactivity may indicate a blunted stress response in the context of relationship conflict.
Conclusions:
- Cortisol reactivity is a key moderator in the relationship between relationship hostility and adiposity.
- These findings refine etiological models of obesity by highlighting the role of biological stress responses.
- Understanding these moderators can inform targeted interventions for obesity prevention.
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