The role of conformation in musculoskeletal problems in the racing Thoroughbred.
Abstract: The relationship of conformation to future potential injury is a standard approach in practise but, at present, is largely based on subjective observations. Objective: To measure conformation in 3-year-old Thoroughbreds and objectively test its relationship with the occurrence of musculoskeletal problems. Methods: Conformation measurements were taken from photographs using specific reference points marked on the horses and processed on the computer. Clinical observations were recorded for each horse on a regular basis. Stepwise (forward) logistic regression analysis was performed to investigate the relationship between the binary response of the clinical outcomes probability and the conformation variables by the method of maximum likelihood. Results: Clinical outcomes significantly (P<0.05) associated with conformational variables included effusion of the front fetlock, effusion of the right carpus, effusion of the carpus, effusion of the hind fetlock, fracture of the left or right carpus, right front fetlock problem and hind fetlock problem. Conclusions: Offset knees (offset ratio) contributed to fetlock problems. Long pasterns increased the odds of a fracture in the front limb. An increase in the carpal angle as viewed from the front (carpal valgus) may serve as a protective mechanism, as the odds for a carpal fracture and carpal effusion decreased with an increase in the carpal angle. Conclusions: This study demonstrates relationships between conformation and musculoskeletal disease in the racehorse. The information may be useful in selection and management of the racing Thoroughbred.
Publication Date: 2004-12-08 PubMed ID: 15581320DOI: 10.2746/0425164044864462Google Scholar: Lookup
The Equine Research Bank provides access to a large database of publicly available scientific literature. Inclusion in the Research Bank does not imply endorsement of study methods or findings by Mad Barn.
- Journal Article
Summary
This research summary has been generated with artificial intelligence and may contain errors and omissions. Refer to the original study to confirm details provided. Submit correction.
The research investigates the association between the physical structure of racing Thoroughbreds and the likelihood of developing musculoskeletal issues. Conformation measurements of three-year-old Thoroughbreds was used to objectively examine its correlation with various musculoskeletal problems.
Research Methodology
- The study procedure involved taking conformation measurements of 3-year-old Thoroughbreds from photographs using specific reference points marked on the horses, which were then processed on a computer.
- Clinical observations for each horse were systematically recorded.
- A stepwise (forward) logistic regression analysis was used to probe the correlation between the clinical outcomes probability and the conformation variables employing the method of maximum likelihood.
Key Findings
- The study made several significant findings indicating certain conformational variables were linked to clinical outcomes such as effusion of the front fetlock, effusion of the right carpus, effusion of the hind fetlock, fracture of the carpus, and issues with the front and hind fetlock.
- Specifically, horses with offset knees (offset ratio) appeared to have an increased likelihood of developing fetlock problems.
- Long pasterns were found to heighten the risks of a fracture in the front limb.
- A potential protective mechanism was identified in the form of a carpal valgus, a variation in the carpal angle viewed from the front. It was found that an increasing carpal angle resulted in decreased odds for a carpal fracture and carpal effusion.
Research Implications
- This study successfully establishes a statistically significant relationship between the conformation of racing Thoroughbreds and their susceptibility to develop musculoskeletal diseases.
- The evidence could be very useful to breeders, trainers, and veterinarians for guiding the selection and management of Thoroughbred racehorses, thereby impacting horse health, performance, and career longevity.
Cite This Article
APA
Anderson TM, McIlwraith CW, Douay P.
(2004).
The role of conformation in musculoskeletal problems in the racing Thoroughbred.
Equine Vet J, 36(7), 571-575.
https://doi.org/10.2746/0425164044864462 Publication
Researcher Affiliations
- Colorado State University, Equine Science and Equine Orthopaedic Research Programs, Fort Collins, Colorado 80523, USA.
MeSH Terms
- Animals
- Carpus, Animal / anatomy & histology
- Carpus, Animal / physiology
- Horse Diseases / etiology
- Horse Diseases / pathology
- Horse Diseases / surgery
- Horses / anatomy & histology
- Horses / injuries
- Horses / physiology
- Likelihood Functions
- Logistic Models
- Muscle, Skeletal / anatomy & histology
- Muscle, Skeletal / pathology
- Musculoskeletal Diseases / pathology
- Musculoskeletal Diseases / surgery
- Musculoskeletal Diseases / veterinary
- Tarsus, Animal / anatomy & histology
- Tarsus, Animal / physiology
- Treatment Outcome
Citations
This article has been cited 14 times.- Kawahisa-Piquini G, Bass L, Pezzanite LM, Moorman VJ. Hoof Unevenness in Juvenile Quarter Horses During First 6 Months of Training. J Equine Vet Sci 2023 Jul;126:104494.
- Sharp Y, Tabor G. An Investigation into the Effects of Changing Dorso-Plantar Hoof Balance on Equine Hind Limb Posture. Animals (Basel) 2022 Nov 24;12(23).
- Horan K, Coburn J, Kourdache K, Day P, Carnall H, Brinkley L, Harborne D, Hammond L, Peterson M, Millard S, Pfau T. Hoof Impact and Foot-Off Accelerations in Galloping Thoroughbred Racehorses Trialling Eight Shoe-Surface Combinations. Animals (Basel) 2022 Aug 23;12(17).
- Schade J, de Souza AF, Vincensi LC, Fonteque JH. The influence of the metacarpophalangeal joint angle on the transversal area and mean echogenicity of the superficial digital flexor tendon and suspensory ligament in gaited horses. J Equine Sci 2021 Dec;32(4):135-141.
- Mostafa MB, Elemmawy YM. Relationships between morphometric measurements and musculoskeletal disorders in jumping Thoroughbred horses. J Equine Sci 2020 Jun;31(2):23-27.
- Gmel AI, Druml T, von Niederhäusern R, Leeb T, Neuditschko M. Genome-Wide Association Studies Based on Equine Joint Angle Measurements Reveal New QTL Affecting the Conformation of Horses. Genes (Basel) 2019 May 14;10(5).
- Hagen J, Kojah K, Geiger M. Correlations between the equine metacarpophalangeal joint angulation and toe conformation in statics. Open Vet J 2018;8(1):96-103.
- Maeda Y, Hanada M, Oikawa MA. Epidemiology of racing injuries in Thoroughbred racehorses with special reference to bone fractures: Japanese experience from the 1980s to 2000s. J Equine Sci 2016;27(3):81-97.
- Wiggers N, Nauwelaerts SL, Hobbs SJ, Bool S, Wolschrijn CF, Back W. Functional locomotor consequences of uneven forefeet for trot symmetry in individual riding horses. PLoS One 2015;10(2):e0114836.
- Ahmad I, Ijaz S, Usman MM, Safdar A, Khan IU, Zeeshan M, Bukhari SSUH. Evaluating Forelimb and Hindlimb Joint Conformation of Morna Racehorses (Equus caballus). Vet Sci 2025 Jan 5;12(1).
- Van Cauter R, Caudron I, Lejeune JP, Rousset A, Serteyn D. Distal sagittal forelimb conformation in young Walloon horses: Radiographic assessment and its relationship with osteochondral fragments. PLoS One 2024;19(10):e0311965.
- Puchalska M, Witkowska-Piłaszewicz O. Gene doping in horse racing and equine sports: Current landscape and future perspectives. Equine Vet J 2025 Mar;57(2):312-324.
- Dahl VE, Singer ER, Garcia TC, Hawkins DA, Stover SM. Hoof Expansion, Deformation, and Surface Strains Vary with Horseshoe Nail Positions. Animals (Basel) 2023 Jun 4;13(11).
- McCoy AM, Scolman KN. Impact of periarticular osteophytes of the distal tarsus diagnosed in nonlame yearling Standardbred horses on racing performance. Vet Surg 2023 Oct;52(7):1050-1056.
Use Nutrition Calculator
Check if your horse's diet meets their nutrition requirements with our easy-to-use tool Check your horse's diet with our easy-to-use tool
Talk to a Nutritionist
Discuss your horse's feeding plan with our experts over a free phone consultation Discuss your horse's diet over a phone consultation
Submit Diet Evaluation
Get a customized feeding plan for your horse formulated by our equine nutritionists Get a custom feeding plan formulated by our nutritionists
