Effect of different head-neck positions on physical and psychological stress parameters in the ridden horse.

The research article discusses how different head-neck positions (HNPs) in horses, particularly hyperflexion, during riding may contribute to physical and psychological stress. It suggests that hyperflexion leads to increased cortisol blood levels and negatively impacts the well-being and behavior of horses.

Study Methodology

• The study examined the effects of different HNPs on stress indicators of ridden horses.
• Physical parameters like heart rate (HR), heart rate variability (HRV), and blood cortisol levels were measured in 18 horses.
• The HRV includes low frequency (LF) and high frequency (HF) signals, which denote the activity of the sympathetic and parasympathetic nervous systems.
• These parameters were recorded in three different scenarios – when the horse was at rest, when it was ridden with a regular working HNP, and when it was ridden with the head, neck, and poll extended into hyperflexion.
• Both the rider and an observer monitored and evaluated the horse’s behavior and rideability during these different stages.

Key Findings

• The researchers found no significant difference in the HR or HRV measurements between a working HNP and hyperflexion.
• However, blood cortisol levels significantly increased in horses under hyperflexion as compared to working HNP.
• The rider and observer’s evaluation reported negative changes in rideability and horse behavior during hyperflexion

Implications of the Study

• The study reveals that hyperflexion can significantly raise the level of physical stress in horses, as reflected by higher blood cortisol levels.
• The observation of the horses’ behavior showcased adverse effects on their well-being during hyperflexion, implying potential psychological stress.
• While traditional riding practices and competitions often deem different HNPs as desirable, this study raises concerns about such practices and their effect on the health and well-being of horses.
• The findings encourage further research regarding methods that would allow horses to perform without inducing unnecessary physiological stress or compromising their welfare.