A new pilot study has provided fresh insight into emotional contagion in human–horse interactions, suggesting that horses do not directly sense human stress itself, but instead respond to the body language associated with it.
The research, titled “Emotional contagion in human–horse interactions: A pilot study investigating the role of stress and body language in emotional transfer”, examined whether human anxiety affects horses, and whether this effect is driven primarily by how people move and behave around them.
What the researchers investigated
The study involved 33 human–horse interactions using a repeated-measures design. Human participants were classified as either high-anxiety or low-anxiety based on validated anxiety scores and heart rate measurements. Each participant interacted with a horse under two conditions:
- Free-style interaction, where movement and expression were natural
- Constrained-style interaction, where body language and expression were deliberately restricted
Throughout the interactions, researchers measured horses’ physiological responses, including heart rate variability, alongside behavioural indicators using an ethogram.
Key findings
Horses showed significantly stronger physiological and behavioural responses during high-anxiety, free-style interactions, indicating increased arousal when anxious body language was freely expressed. In contrast, when anxious handlers used constrained, controlled body language, horses showed no significant difference in responses compared with low-anxiety handlers.
These findings suggest that horses are not inherently reacting to human stress or anxiety itself, but rather to the physical cues, posture, movement and expression that accompany it.
Why this matters
The study highlights the importance of mindful, structured handling techniques in reducing stress transfer from humans to horses. By adopting calm, neutral and controlled body language, handlers may be able to create a more stable and reassuring environment, supporting better welfare outcomes.
This has clear implications for everyday horse management, training, veterinary handling and equine-assisted activities, where human emotions can run high and unintentional stress signals may influence equine behaviour.
While the authors note that this was a pilot study, the results add to a growing body of evidence emphasising the role of human behaviour in shaping horse responses, and underline the value of awareness and consistency in human–horse interactions.
👉 The full paper is available via PubMed and provides detailed methodology and analysis for those wishing to explore the findings in depth. Click here to read.
