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Home / Equine Research Bank / Equine Vet J / Equine digital tendons show breed-specific differences in th...
Equine veterinary journal2019; 52(2); 320-325; doi: 10.1111/evj.13169

Equine digital tendons show breed-specific differences in their mechanical properties that may relate to athletic ability and predisposition to injury.

Abstract: Throughout the ages, human subjects have selected horse breeds for their locomotor capacities. Concurrently, tissue properties may have diversified because of specific requirements of different disciplines. Objective: The aim of this study was to compare the biomechanical properties of tendons with different functions between equine breeds traditionally selected for racing or sport. Methods: This study used ex vivo tendons and compared the mechanical properties of the common digital extensor tendon (CDET) and superficial digital flexor tendon (SDFT) between racehorses (Thoroughbred [TB]) and sports horses (Friesian Horse [FH], Warmblood [WB]). Methods: The SDFT and CDET of FH (n = 12), WBs (n = 12) and TBs (n = 8) aged 3-12 years were harvested. The cross sectional area (cm2 ), maximal load (N), ultimate strain (%), ultimate stress (MPa) and elastic modulus (MPa) were determined and tested for significant differences between the breeds (P<0.05). Results: The SDFT from WB horses had a significantly lower elastic modulus than TB horses and failed at a higher strain and load than both FHs and TBs. The mechanical properties of the CDET did not differ between breeds. In agreement with previous studies, the CDET failed at a higher stress and had a higher elastic modulus than the SDFT and, for the WB group of horses only, failed at a significantly lower strain. Interestingly, the mode of failure differed between breeds, particularly with respect to the FHs. Conclusions: The exercise history of horses used in this study was unknown and the age-range was relatively large; both these factors may have influenced the absolute properties reported in this study. Conclusions: This study shows for the first time that mechanical properties of the SDFT differ between breeds. These properties are likely to be related to selection for high-speed vs. an extravagant elastic gait and may be an important indicator of performance ability. The Summary is available in Spanish - see Supporting Information.
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Publication Date: 2019-09-23 PubMed ID: 31442314DOI: 10.1111/evj.13169Google Scholar: Lookup
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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 study investigates the mechanical properties of tendons in different horse breeds and finds that these properties, which are likely resulted from selective breeding for certain athletic abilities, differ between breeds.

Objective of the Research

  • The main goal of the study is to examine the differences in the biomechanical properties of tendons in different horse breeds, particularly in those breeds selected traditionally for racing or sport. This investigation focuses on the common digital extensor tendon (CDET) and superficial digital flexor tendon (SDFT).

Methods Used in the Research

  • The study used ex vivo tendons taken from three horse breeds: Thoroughbred (TB), Friesian Horse (FH), and Warmblood (WB). A total of 8 TBs, 12 FHs, and 12 WBs, aged between 3 to 12 in years, were involved in the study.
  • The biomechanical properties studied include the cross-sectional area, maximum load, ultimate strain, ultimate stress, and elastic modulus. These properties were obtained for each tendon type in each breed, with statistical significance tested.

Findings of the Study

  • The research found that the SDFT from WB horses had a lower elastic modulus than TB horses and failed at a higher strain and load than both FHs and TBs. However, the mechanical properties of the CDET were not significantly different between breeds.
  • On comparison between the tendons, the CDET generally failed at a higher stress and had a higher elastic modulus than the SDFT. Especially for the WB horses, the CDET failed at a lower strain.
  • Interestingly, the mode of tendon failure differed among the horse breeds, with marked differences in the FH breed.
  • The study acknowledges some constraints in their results may be due to the unknown exercise history of the horses used and the relatively large age-range. Both these factors could potentially influence the observed tendon properties.

Conclusions Drawn from the Study

  • The study concludes that the biomechanical properties of the SDFT indeed differ between horse breeds. This variance is attributed to selective breeding for high speed in some breeds versus extravagant elastic gait in others, and these properties may serve as important indicators of performance capabilities.

Cite This Article

APA
Verkade ME, Back W, Birch HL. (2019). Equine digital tendons show breed-specific differences in their mechanical properties that may relate to athletic ability and predisposition to injury. Equine Vet J, 52(2), 320-325. https://doi.org/10.1111/evj.13169

Publication

Equine veterinary journal
ISSN: 2042-3306
NlmUniqueID: 0173320
Country: United States
Language: English
Volume: 52
Issue: 2
Pages: 320-325

Researcher Affiliations

Verkade, M E
  • Department of Equine Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, the Netherlands.
Back, W
  • Department of Equine Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, the Netherlands.
  • Department of Surgery and Anaesthesiology, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium.
Birch, H L
  • Department of Orthopaedics and Musculoskeletal Science, University College London, London, UK.

MeSH Terms

  • Animals
  • Breeding
  • Horses
  • Sports
  • Tendon Injuries / veterinary
  • Tendons

References

This article includes 38 references
  1. Kastelic J, Galeski A, Baer E. The multicomposite structure of tendon.. Connect. Tissue Res. 6, 11-23.
  2. Tsuzaki M, Yamauchi M, Banes AJ. Tendon collagens: Extracellular matrix composition in shear stress and tensile components of flexor tendons.. Connect. Tissue Res. 29, 141-152.
  3. Crevier N, Pourcelot P, Denoix JM, Geiger D, Bortolussi C, Ribot X, Sanaa M. Segmental variations of in vitro mechanical properties in equine superficial digital flexor tendons.. Am. J. Vet. Res. 57, 1111-1117.
  4. Kjaer M. Role of extracellular matrix in adaptation of tendon and skeletal muscle to mechanical loading.. Physiol. Rev. 84, 649-698.
  5. Wang JH. Mechanobiology of tendon.. J. Biomech. 39, 1563-1582.
  6. Thorpe CT, Riley GP, Birch HL, Clegg PD, Screen HRC. Effect of fatigue loading on structure and functional behaviour of fascicles from energy-storing tendons.. Acta Biomater. 10, 3217-3224.
  7. Birch HL, Wilson AM, Goodship AE. Physical activity: Does long-term, high-intensity exercise in horses result in tendon degeneration?. J. Appl. Physiol. 105, 1927-1933.
  8. Kannus P. Structure of the tendon connective tissue.. Scand. J. Med. Sci. Sports. 10, 312-320.
  9. Wilmink J, Wilson AM, Goodship AE. Functional significance of the morphology and micromechanics of collagen fibres in relation to partial rupture of the superficial digital flexor tendon in racehorses.. Res. Vet. Sci. 53, 354-359.
  10. Kirkendall DT, Garrett WE. Function and biomechanics of tendons.. Scand. J. Med. Sci. Sports. 7, 62-66.
  11. Wilson AM, McGuigan MP, Su A, van den Bogert AJ. Horses damp the spring in their step.. Nature 414, 895-899.
  12. Thorpe CT, Stark RJ, Goodship AE, Birch HL. Mechanical properties of the equine superficial digital flexor tendon relate to specific collagen cross-link levels.. Equine Vet. J. 42, 538-543.
  13. van Souza MV, Weeren PR, van Schie HT, van de Lest CH. Regional differences in biochemical, biomechanical and histomorphological characteristics of the equine suspensory ligament.. Equine Vet. J. 42, 611-620.
  14. Riemersma DJ, De Bruyn P. Variations in cross-sectional area and composition of equine tendons with regard to their mechanical function.. Res. Vet. Sci. 41, 7-13.
  15. Batson EL, Paramour RJ, Smith TJ, Birch HL, Patterson-Kane JC, Goodship AE. Are the material properties and matrix composition of equine flexor and extensor tendons determined by their functions?. Equine Vet. J. 35, 314-318.
  16. Birch HL. Tendon matrix composition and turnover in relation to functional requirements.. Int. J. Exp. Pathol. 88, 241-248.
  17. Dowling BA, Dart AJ. Mechanical and functional properties of the equine superficial digital flexor tendon.. The Vet J. 170, 184-192.
  18. Thorpe CT, Udeze CP, Birch HL, Clegg PD, Screen HR. Capacity for sliding between tendon fascicles decreases with ageing in injury prone equine tendons: A possible mechanism for age-related tendinopathy?. Eur. Cell Mater. 25, 48-60.
  19. Murray RC, Dyson SJ, Tranquille C, Adams V. Association of type of sport and performance level with anatomical site of orthopaedic injury diagnosis.. Equine Vet. J. 38, Suppl. 36, 411-416.
  20. Van Riet MI, Van den Belt AJM, Back W. Retrospective study of tendon and ligament distal limb injuries detected using ultrasound in Friesian horses admitted to an university hospital (2002-2012).. Proc. Voorjaarsdagen Congress, Amsterdam, The Netherlands. 2.
  21. Brommer H, Voermans M, Veraa S, Van den Belt AJM, Van der Toorn A, Ploeg M, Gröne A, Back W. Axial osteitis of the proximal sesamoid bones and desmitis of the intersesamoidean ligament in the hindlimb of Friesian horses: review of 12 cases (2002-2012) and post-mortem analysis of the bone-ligament interface.. BMC Vet. Res. 10.
    doi: 10.1186/s12917-014-0272-xgoogle scholar: lookup
  22. Van den Belt AJM, Dik KJ, Barneveld A. Ultrasonographic evaluation and long-term follow-up of flexor tendonitis/desmitis in the metacarpal/metatarsal region in Dutch warmblood horses and standardbred racehorses.. Vet. Q. 16, Suppl. 2, S76-80.
  23. Goodship AE, Birch HL. Cross sectional area measurement of tendon and ligament in vitro: a simple, rapid, non-destructive technique.. J. Biomech. 38, 605-608.
  24. Biewener AA. Muscle-tendon stresses and elastic energy storage during locomotion in the horse.. Comp. Biochem. Physiol. B. Biochem. Mol. Biol. 120, 73-87.
  25. Alexander R. Elastic Mechanisms in Animal Movement. Cambridge University Press Cambridge, UK.
  26. Harrison SM, Whitton RC, Kawcak CE, Stover SM, Pandy MG. Relationship between muscle forces, joint loading and utilization of elastic strain energy in equine locomotion.. J. Exp. Biol. 213, 3998-4009.
  27. Schambardt HC, Merkens HW, Vogel V, Willekens C. External loads on the limbs of jumping horses at take-off and landing.. Am. J. Vet. Res. 54, 675-680.
  28. Meershoek LS, Schamhardt HC, Roepstorff L, Johnston C. Forelimb tendon loading during jump landings and the influence of fence height.. Equine Vet. J. 33, 6-10.
  29. Burns TE, Clayton HM. Comparison of the temporal kinematics of the canter pirouette and collected canter.. Equine Vet. J. 29, 58-61.
  30. Thorpe CT, Godinho MSC, Riley GP, Birch HL, Clegg PD, Screen HRC. The interfascicular matrix enables fascicle sliding and recovery in tendon, and behaves more elastically in energy storing tendons.. J. Mech. Behav. Biomed. Mater. 52, 85-94.
  31. Thorpe CT, Streeter I, Pinchbeck GL, Goodship AE, Clegg PD, Birch HL. Aspartic acid racemization and collagen degradation markers reveal an accumulation of damage in tendon collagen that is enhanced with aging.. J. Biol. Chem. 285, 15674-15681.
  32. Ely ER, Avella CS, Price JS, Smith RKW, Wood JLN, Verheyen KLP. Descriptive epidemiology of fracture, tendon and suspensory ligament injuries in National Hunt racehorses in training.. Equine Vet. J. 41, 372-378.
  33. Murray RC, Dyson SJ, Tranquille C, Adams V. Association of type of sport and performance level with anatomical site of orthopaedic injury diagnosis.. Equine Vet. J. 38, 411-416.
  34. Dyson S. Lameness and poor performance in the sport horse: Dressage, show jumping and horse trials.. J Equine Vet Sci. 22, 145-150.
  35. Crişan MI, Damian A, Ştefănuţ LC, Dezdrobitu CC, Neagu DM, Denoix J. Global Epidemiological Analysis of Prevalence and Risk Factors Associated With the Deep Digital Flexor Tendinopathy in the Equine Distal Limb: 100 Cases.. J Equine Vet Sci. 67, 55-60.
  36. Van den Belt AJM, Becker CK, Dik KJ. Desmitis of the accessory ligament of the deep digital flexor tendon in the horse: clinical and ultrasonographic features. A report of 24 cases.. Zentralbl Veterinärmed. A. 40, 492-500.
  37. Boerma S, Back W, Sloet MM. The Friesian horse breed: A clinical challenge to the equine veterinarian?. Equine vet. educ. 24, 66-71.
  38. Gussekloo SWS, Lankester J, Kersten W, Back W. Effect of differences in tendon properties on functionality of the passive stay apparatus in horses.. Am. J. Vet. Res. 72, 474-483.

Citations

This article has been cited 5 times.
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  4. Shojaee A. Equine tendon mechanical behaviour: Prospects for repair and regeneration applications. Vet Med Sci 2023 Sep;9(5):2053-2069.
    doi: 10.1002/vms3.1205pubmed: 37471573google scholar: lookup
  5. Bartolomé E, Perdomo-González DI, Sánchez-Guerrero MJ, Valera M. Genetic Parameters of Effort and Recovery in Sport Horses Assessed with Infrared Thermography. Animals (Basel) 2021 Mar 16;11(3).
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