Analysis of stress fractures associated with lameness in Thoroughbred flat racehorses training on different track surfaces undergoing nuclear scintigraphic examination.

The research article discusses a study conducted to understand the impact of training track surfaces on the prevalence of stress fractures in racehorses. The findings suggest that those training on synthetic surfaces showed a higher rate of such fractures, indicating that the type of training surface might be a relevant factor. However, the study also indicates the need for further investigation as there may be other influencing elements including training methodologies.

Objectives and Methodology of the Research

• The aim of the study was to determine how the surface of training tracks might influence the occurrence of long bone and pelvic stress fractures in Thoroughbred flat racehorses. These fractures contribute to lameness in the animals and affect their performance.
• The study was retrospective in nature, utilizing previously collected data from two different horse hospitals between the years 1994 and 2009.
• The horses studied were from a hospital in Toronto, where they trained at a single track that initially had a dirt surface, but was changed to a synthetic one in 2006, and another hospital associated with the University of Pennsylvania, where the horses either trained on dirt or turf surfaces.
• Scintigraphic examinations, or bone scans, were used to identify stress fractures and a blinded reviewer evaluated all the images. Statistical methods, including Fisher’s exact test and logistic regression, were used to analyze the data.

Results of the Study

• Of the 528 bone scans examined from the Toronto hospital, a higher proportion of stress fractures were found in horses training on synthetic surfaces (31.7%) compared to those training on dirt surfaces (23.0%).
• In fractures categorized specifically as hindlimb/pelvic and tibial stress fractures, the proportion was again greater among horses trained on the synthetic surface.

Conclusions Drawn from the Research

• From this study, it can be inferred that the surface of the training track could influence the proportion of stress fractures in Thoroughbred racehorses, with synthetic surfaces potentially resulting in a higher rate of fractures.
• However, the authors caution that other factors, such as training techniques adopted, may also play a vital role and must be taken into consideration.
• The study concludes by recommending future prospective studies to fully understand the relationship between training track surface, stress fractures, and other non-fatal musculoskeletal injuries in racehorses.