Joint moments in the distal forelimbs of jumping horses during landing

Authors

  • L. S. MEERSHOEK,

    Corresponding author
    1. Department of Veterinary Anatomy and Physiology, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
    2. Institute for Fundamental and Clinical Human Movement Sciences, Vrije Universiteit, Amsterdam, The Netherlands
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      UMR INRA-ENVA Biomechanics and Locomotor Pathology of the Horse, École National Vétérinaire d'Alfort, 7, Avenue du Général de Gaulle, F 94704 Maisons-Alfort, France

  • L. ROEPSTORFF,

    1. Department of Equine Studies, Faculty of Veterinary Medicine, Swedish University of Agricultural Sciences, Uppsala, Sweden
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      UMR INRA-ENVA Biomechanics and Locomotor Pathology of the Horse, École National Vétérinaire d'Alfort, 7, Avenue du Général de Gaulle, F 94704 Maisons-Alfort, France

  • H. C. SCHAMHARDT,

    1. Department of Veterinary Anatomy and Physiology, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
    2. Institute for Fundamental and Clinical Human Movement Sciences, Vrije Universiteit, Amsterdam, The Netherlands
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      During preparation of the manuscript, Dr Henk C. Schamhardt sadly passed away

  • C. JOHNSTON,

    1. Department of Anatomy and Histology, Faculty of Veterinary Medicine, Swedish University of Agricultural Sciences, Uppsala, Sweden
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      UMR INRA-ENVA Biomechanics and Locomotor Pathology of the Horse, École National Vétérinaire d'Alfort, 7, Avenue du Général de Gaulle, F 94704 Maisons-Alfort, France

  • M. F. BOBBERT

    1. Institute for Fundamental and Clinical Human Movement Sciences, Vrije Universiteit, Amsterdam, The Netherlands
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      UMR INRA-ENVA Biomechanics and Locomotor Pathology of the Horse, École National Vétérinaire d'Alfort, 7, Avenue du Général de Gaulle, F 94704 Maisons-Alfort, France


Department of Veterinary Anatomy and Physiology, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands

Summary

Tendon injuries are an important problem in athletic horses and are probably caused by excessive loading of the tendons during demanding activities. As a first step towards understanding these injuries, the tendon loading was quantified during jump landings. Kinematics and ground reaction forces were collected from the leading and trailing forelimbs of 6 experienced jumping horses. Joint moments were calculated using inverse dynamic analysis. It was found that the variation of movement and loading patterns was small, both within and between horses. The peak flexor joint moments in the coffin and fetlock joints were larger in the trailing limb (−0.62 and −2.44 Nm/kg bwt, respectively) than in the leading limb (−0.44 and −1.93 Nm/kg bwt, respectively) and exceeded literature values for trot by 82 and 45%. Additionally, there was an extensor coffin joint moment in the first half of the stance phase of the leading limb (peak value 0.26 ± 0.18 Nm/kg bwt). From these results, it was concluded that the loading of the flexor tendons during landing was higher in the trailing than in the leading limb and that there was an unexpected loading of the extensor tendon in the leading limb.

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