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Home / Equine Research Bank / Animals (Basel) / Thoroughbred Geldings’ Career: Influence of Age at the...
Animals : an open access journal from MDPI2026; 16(4); 576; doi: 10.3390/ani16040576

Thoroughbred Geldings’ Career: Influence of Age at the Start of Training and Racing.

Abstract: This retrospective report investigated whether starting racehorses' training and racing early is associated with a less successful and a shorter racing career. The data of 600 Thoroughbred racehorses from the German Racehorse Association's archiving programme were evaluated. The horses were classified into three groups regarding their different ages when starting training and racing: early training (16-24 months old)/early racing (two years old); early training/late racing (>two years old); and late training (25-30 months). Statistical models investigated effects on the horses' length of career. The results showed that the length of their racing career was influenced by sex; geldings showed the longest career as they do not enter breeding programmes, and were analyzed separately. Geldings entering training early, with their first race at two years old, showed higher ratings and a similar length of racing career than those with their first race at three years old or more. Thus, early racing appeared to have had no negative effect on the length of the racing career or perseverance in racing in the geldings investigated. Further studies researching training effects and physiological resilience should consider alternative explanations for racing selection criteria (e.g., early maturation advantage and prior unsoundness) and the reason for ending a racing career.
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Publication Date: 2026-02-12 PubMed ID: 41751035PubMed Central: PMC12937351DOI: 10.3390/ani16040576Google Scholar: Lookup
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  • 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.

Overview

  • This study investigated whether the age at which Thoroughbred geldings start training and begin racing influences the length and success of their racing careers.
  • It specifically analyzed if early training and early racing negatively affect career longevity or performance compared to later starts.

Background and Purpose

  • There is a common belief that beginning training and racing at a younger age might lead to shorter or less successful racing careers because of potential physical strain or injury.
  • The study aimed to clarify if early starting age indeed harms racing career length or performance, focusing on Thoroughbred geldings.
  • Geldings were chosen for separate analysis because they do not continue into breeding after racing, thus their racing careers solely reflect racing factors.

Data and Methodology

  • The study used retrospective data from 600 Thoroughbred racehorses obtained through the German Racehorse Association’s archive.
  • Horses were grouped based on the age they began training and started racing:
    • Early training (16-24 months old) and early racing (at 2 years old)
    • Early training but late racing (racing started after 2 years old)
    • Late training (25-30 months old)
  • Statistical models were applied to evaluate how these categories affected the length of racing careers.

Key Findings

  • The horse’s sex influenced career length, with geldings having the longest careers because they do not move to breeding programs.
  • Among geldings, those that started training early and raced at two years old achieved higher racing ratings compared to those that started racing later.
  • Despite starting early, these geldings had a racing career length similar to geldings with later racing starts, suggesting no negative impact of early racing on career duration.
  • This result challenges the assumption that early training and racing necessarily shorten or weaken a horse’s racing career.

Implications and Recommendations

  • The findings imply early exposure to training and racing could be beneficial or at least not harmful for the longevity and performance of geldings in racing.
  • Researchers should explore other factors that might influence racing career length, such as:
    • Physiological resilience of horses to stress and injury
    • Maturation advantages where earlier starters might be physically more developed
    • Possibility that horses with prior unsoundness (injuries or health issues) are excluded from early racing
    • The specific reasons why racing careers end, which may not be related solely to starting age
  • Future studies should consider these alternative explanations to fully understand the dynamics of racehorse career development.

Cite This Article

APA
Hein M, Volkmann N, Probst J, Kemper N, Venner M. (2026). Thoroughbred Geldings’ Career: Influence of Age at the Start of Training and Racing. Animals (Basel), 16(4), 576. https://doi.org/10.3390/ani16040576

Publication

Animals : an open access journal from MDPI
ISSN: 2076-2615
NlmUniqueID: 101635614
Country: Switzerland
Language: English
Volume: 16
Issue: 4
PII: 576

Researcher Affiliations

Hein, Mailin
  • Clinic for Horses, University of Veterinary Medicine Hannover, 30559 Hanover, Germany.
Volkmann, Nina
  • Institute of Animal Hygiene, Animal Welfare and Farm Animal Behaviour (ITTN), University of Veterinary Medicine Hannover, 30173 Hanover, Germany.
Probst, Jeanette
  • Institute of Animal Hygiene, Animal Welfare and Farm Animal Behaviour (ITTN), University of Veterinary Medicine Hannover, 30173 Hanover, Germany.
Kemper, Nicole
  • Institute of Animal Hygiene, Animal Welfare and Farm Animal Behaviour (ITTN), University of Veterinary Medicine Hannover, 30173 Hanover, Germany.
Venner, Monica
  • Equine Clinic Destedt GmbH, Destedt, 38162 Cremlingen, Germany.

Conflict of Interest Statement

The authors declare no conflicts of interest.

References

This article includes 35 references
  1. Heleski C, Stowe CJ, Fiedler J, Peterson ML, Brady C, Wickens C, MacLeod JN. Thoroughbred racehorse welfare through the lens of ‘social license to operate’-with an emphasis on a U.S. perspective. Sustainability 2020;12:1706.
    doi: 10.3390/su12051706google scholar: lookup
  2. Pearson G, Douglas J. Start ‘em young, treat ‘em right: How horses’ early life experiences can set them up for success in life. Equine Vet. J. 2025;57:540–545.
    doi: 10.1111/evj.14485pubmed: 40045757google scholar: lookup
  3. Golombeck N. Können Galopprennen Tiergerecht Sein?. SPIEGEL Sport 3 December 2019.
  4. Syperek S. So Sehr Leiden Rennpferde. German Animal Welfare Federation .
  5. Bolwell CF. Epidemiological Studies of Early Exercise and Measures of Training and Racing Performance in Thoroughbred Racehorses. .
  6. Annan R, Trigg LE, Hockenhull J, Allen K, Butler D, Valenchon M, Mullan S. Racehorse welfare across a training season. Front. Vet. Sci. 2023;28:1208744.
    doi: 10.3389/fvets.2023.1208744pmc: PMC10336241pubmed: 37448582google scholar: lookup
  7. Hampton JO, Jones B, McGreevy PD. Social license and animal welfare: Developments from the past decade in Australia. Animals 2020;10:2237.
    doi: 10.3390/ani10122237pmc: PMC7760378pubmed: 33260531google scholar: lookup
  8. . Guidelines BMEL Tierschutz im Pferdesport; Leitlinien zu Umgang mit und Nutzung von Pferden unter Tierschutzgesichtspunkten. July 2020.
  9. . RACING RULES (RR), Dated 1 March 1960, in the New Version Dated 1 January 1991, with Amendments up to April 2024. Deutscher Galopp e.V., German Jockey Club .
  10. Sobczynska M. The effect of selected factors on length of racing career in Thoroughbred racehorses in Poland. Anim. Sci. Pap. Rep. 2007;25:131–141.
  11. Velie BD, Knight PK, Thomson PC, Wade CM, Hamilton NA. The association of age at first start with career length in the Australian Thoroughbred racehorse population. Equine Vet. J. 2013;45:410–413.
    doi: 10.1111/j.2042-3306.2012.00651.xpubmed: 23009388google scholar: lookup
  12. More SJ. A longitudinal study of racing Thoroughbreds: Performance during the first years of racing. Aust. Vet. J. 1999;77:105–112.
    doi: 10.1111/j.1751-0813.1999.tb11678.xpubmed: 10078358google scholar: lookup
  13. Tanner JC, Rogers CW, Firth EC. The association of two year old training milestones with career length and racing success in a sample of Thoroughbred horses in New Zealand. Equine Vet. J. 2013;45:20–24.
    doi: 10.1111/j.2042-3306.2011.00534.xpubmed: 22320408google scholar: lookup
  14. Reilly GC, Currey JD, Goodship AE. Exercise of Young Thoroughbred Horses Increases Impact Strength of the Third Metacarpal Bone. J Orthop Res 1997;15:862–868.
    doi: 10.1002/jor.1100150611pubmed: 9497811google scholar: lookup
  15. Van Weeren PR. The potential role of training programmes in reducing injuries. Pferdeheilkunde 2011;27:706–710.
    doi: 10.21836/PEM20110620google scholar: lookup
  16. Rogers CW, Bolwell CF, Gee EK, Rosanowski SM. Equine musculoskeletal development and performance: Impact of the production system and early training. Anim. Prod. Sci. 2020;60:2069–2079.
    doi: 10.1071/AN17685google scholar: lookup
  17. Knight PK, Thomson PC. Age at first start and racing career of a cohort of Australian Standardbred horses. Aust. Vet. J. 2011;89:325–330.
    doi: 10.1111/j.1751-0813.2011.00816.xpubmed: 21864303google scholar: lookup
  18. Jeffcott LB, Rossdale PD, Freestone J, Frank CJ, Towers-Clark PF. An assessment of wastage in Thoroughbred racing from conception to 4 years of age. Equine Vet. J. 1982;14:185–198.
    doi: 10.1111/j.2042-3306.1982.tb02389.xpubmed: 7106081google scholar: lookup
  19. Firth EC, Rogers CW, Perkins NR, Anderson BH, Grace ND. Musculoskeletal responses of 2-year-old Thoroughbred horses to early training. 1. Study design, and clinical, nutritional, radiological and histological observations. N. Z. Vet. J. 2004;52:261–271.
    doi: 10.1080/00480169.2004.36438pubmed: 15768122google scholar: lookup
  20. Bolwell CF, Rogers CW, French NP, Firth EC. Risk factors for interruptions occurring before the first trial start of 2-year-old Thoroughbred racehorses in training. N. Z. Vet. J. 2012;60:241–246.
    doi: 10.1080/00480169.2012.673163pubmed: 22712776google scholar: lookup
  21. Verheyen K, Price J, Wood J. Exercise during training is associated with racing performance in Thoroughbreds. Vet. J. 2009;181:43–47.
    doi: 10.1016/j.tvjl.2009.03.008pubmed: 19375960google scholar: lookup
  22. Perkins NR, Reid SWJ, Morris RS. Profiling the New Zealand Thoroughbred racing industry. 2. Conditions interfering with training and racing. N. Z. Vet. J. 2004;53:69–76.
    doi: 10.1080/00480169.2005.36471pubmed: 15731837google scholar: lookup
  23. . Deutscher Galopp e.V German Jockey Club Breeding Programme, Dated 1 March 1960, in the New Version Dated 1 November 2018, with Amendments up to January 2024. .
  24. . Deutscher Galopp; Das Vollblut. .
  25. Firth EC, Rogers CW. Musculoskeletal responses of 2-year-old Thoroughbred horses to early training. Conclusions. N. Z. Vet. J. 2005;53:377–383.
    doi: 10.1080/00480169.2005.36581pubmed: 16317437google scholar: lookup
  26. Thiruvenkadan AK, Kandasamy N, Panneerselvam S. Inheritance of racing performance of Thoroughbred horses. Livest. Sci. 2009;121:308–326.
    doi: 10.1016/j.livsci.2008.07.009google scholar: lookup
  27. Cappelli K, Mecocci S, Porceddu A, Albertini E, Giontella A, Miglio A, Silvestrelli M, Verini Supplizi A, Marconi G, Capomaccio S. Genome-wide epigenetic modifications in sports horses during training as an adaptation phenomenom. Sci. Rep. 2023;13:18786.
    doi: 10.1038/s41598-023-46043-wpmc: PMC10620398pubmed: 37914824google scholar: lookup
  28. Yildirim IG, Karaarslan S, Erkan A. Distribution of race and training—related musculoskeletal injuries by track and location in Thoroughbred and Arabian racehorses. Equine Vet. J. 2025;57:878–888.
    doi: 10.1111/evj.14457pubmed: 39777406google scholar: lookup
  29. Bourke JM. 2-year-old racing. Aust. Equine Vet. 1990;8:146–147.
  30. Bourke JM. Wastage in Thoroughbreds. Veterinary Continuing Education Publication No. 167 1995.
  31. Reardon RJM, Boden LA, Mellor DJ, Love S, Newton JR, Stirk AJ, Parkin TDH. Risk factors for superficial digital flexor tendinopathy in Thoroughbred racehorses in hurdle starts in the UK (2001-2009). Equine Vet. J. 2012;44:564–569.
    doi: 10.1111/j.2042-3306.2012.00552.xpubmed: 22372389google scholar: lookup
  32. Mohammed HO, Hill T, Lowe J. Risk-factors associated with injuries in Thoroughbred horses. Equine Vet. J. 1991;23:445–448.
    doi: 10.1111/j.2042-3306.1991.tb03758.xpubmed: 1778162google scholar: lookup
  33. Parkin TDH, Clegg PD, French NP, Proudman CJ, Riggs CM, Singer ER, Webbon PM, Morgan KL. Horse-level risk factors for fatal distal limb fracture in racing Thoroughbreds in the UK. Equine Vet. J. 2004;36:513–519.
    doi: 10.2746/0425164044877387pubmed: 15460076google scholar: lookup
  34. Verheyen K, Price J, Lanyon L, Wood J. Exercise distance and speed affect the risk of fracture in racehorses. Bone 2006;39:1322–1330.
    doi: 10.1016/j.bone.2006.05.025pubmed: 16926125google scholar: lookup
  35. Parkin TDH. Epidemiology of racetrack injuries in racehorses. Vet. Clin. N. Am. Equine Pract. 2008;24:1–19.
    doi: 10.1016/j.cveq.2007.11.003pubmed: 18314033google scholar: lookup

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