Document Detail

Training-related factors associated with dorsometacarpal disease in young Thoroughbred racehorses in the UK.
MedLine Citation:
PMID:  16163947     Owner:  NLM     Status:  MEDLINE    
REASONS FOR PERFORMING STUDY: Dorsometacarpal disease (DMD) is common in young Thoroughbred (TB) racehorses, often interfering with their training programme. No reports exist on incidence rate or associated risk factors in the UK. OBJECTIVES: To estimate the incidence rate of DMD in TB horses in training for flat racing in the UK and identify associated risk factors, particularly in relation to training regimens. METHODS: Data were drawn from a large prospective study in which TB horses in 13 training yards were monitored for a period of up to 2 years, recording daily training information and details of musculoskeletal injury, including DMD. The incidence of DMD was calculated and survival analysis performed to determine features of the training regimen related to the risk of disease. RESULTS: A total of 335 horses provided 4235 months at risk of DMD. Seventy-nine first episodes were recorded, resulting in an incidence rate of 1.87/100 horse months (95% confidence interval 1.50-2.33). Increasing exercise distances at canter and high speed in short periods (up to 1 month) were associated with an increasing risk of DMD. However, increasing cumulative exercise distances since entering training were associated with a decreasing risk of the disease. CONCLUSIONS: The risk of DMD in young TBs decreases with accumulation of distances exercised at canter and high speed; this reflects the adaptive response of the third metacarpal bone to the loads placed upon it. However, increasing exercise distances in short periods (up to 1 month) increases the risk of DMD, probably as a consequence of microdamage and its associated remodelling response, and should therefore be avoided. POTENTIAL RELEVANCE: Training regimens for young TBs can be adjusted to prevent the occurrence of DMD. Early but gradual introduction of small amounts of high-speed exercise may be beneficial. Canter exercise should be kept minimal on high-speed work days and large amounts of both cantering and high-speed work per week, 2 weeks or per month should be avoided, particularly during the early stages of training, in order to minimise the risk of DMD.
K L P Verheyen; W E Henley; J S Price; J L N Wood
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Equine veterinary journal     Volume:  37     ISSN:  0425-1644     ISO Abbreviation:  Equine Vet. J.     Publication Date:  2005 Sep 
Date Detail:
Created Date:  2005-09-16     Completed Date:  2005-12-22     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0173320     Medline TA:  Equine Vet J     Country:  England    
Other Details:
Languages:  eng     Pagination:  442-8     Citation Subset:  IM    
Epidemiology Unit, Animal Health Trust, Lanwades Park, Kentford, Suffolk CB8 7UU, UK.
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MeSH Terms
Great Britain / epidemiology
Horse Diseases / epidemiology*,  etiology,  prevention & control
Joint Diseases / epidemiology,  etiology,  prevention & control,  veterinary*
Lameness, Animal / epidemiology*,  etiology,  prevention & control
Metacarpus / injuries*
Physical Conditioning, Animal / adverse effects*,  physiology
Proportional Hazards Models
Prospective Studies
Risk Factors
Time Factors

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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