How prior racing performance influences competition level in off-the-track Thoroughbred horses’ post-racing eventing careers.

Overview

• The study investigates how prior racing performance of Thoroughbred horses affects their competition level in post-racing eventing careers in Australia.
• It reveals that success on the racetrack is not a strong predictor of success in eventing, though some race characteristics like longer race distances correlate with higher eventing levels.

Introduction and Research Objective

• The welfare of retired racehorses is an important issue, emphasizing the need for effective rehoming strategies.
• One key question is whether a horse’s performance during its racing career can predict how well it will perform in other equestrian sports after retirement.
• This study aims to determine associations between prior racing metrics and eventing performance in off-the-track Thoroughbreds competing in Australia.

Methods

• Data was collected for 6,828 Thoroughbreds registered with Equestrian Australia who had transitioned from racing to eventing.
• Two sets of metrics were gathered: racing performance data and eventing performance data.
• Horses were grouped based on their eventing competition level: those competing at EvA95 level and above (higher-level eventing) and those below EvA95 (lower-level eventing).
• Statistical analyses, including summary statistics and generalized linear models, were used to assess differences and influences between racing and eventing measures.

Key Findings

• Horses that did not reach higher eventing levels (EvA95 and above) actually had significantly better racing performance and longer racing careers (P < 0.01).
• The time since the horse’s last race was positively associated with many eventing performance parameters, suggesting that a break from racing may influence success in eventing.
• Horses whose best race distances were longer were more likely to achieve higher eventing levels, indicating some correlation between race stamina and eventing capability.

Interpretation and Implications

• The counterintuitive finding that better race performers had lower eventing success suggests that skills needed for racing and eventing differ substantially.
• Riders looking for high-level event prospects might prioritize Thoroughbreds with experience in longer race distances rather than purely focusing on racing success intensity or frequency.
• Racing performance alone should not be used as the sole predictor for eventing potential—other qualities such as stride characteristics (e.g., gait, agility), temperament, and the synergy with the rider also play critical roles.
• This highlights the complexity of rehoming strategies and the need for multifactorial assessments when transitioning racehorses to new disciplines to ensure horse welfare and success.

Conclusions

• There is no straightforward predictive relationship between thoroughbred racing success and subsequent eventing outcomes.
• Horse selection for eventing should include considerations beyond race history, focusing on physical and behavioral traits and rider compatibility.
• This research contributes valuable insights for trainers, riders, and welfare advocates involved in the rehoming and retraining of former racehorses.