title: Accuracy of the TurfTrax Racing Data System for determination of equine speed and position.
abstract: BACKGROUND
  The speed and position data collected by TurfTrax Racing Data Limited during UK Thoroughbred racing have potential to benefit equine science and welfare. The size (the 2006 data set alone consists of 30,932 individual horse starts across 2667 races) and nature (speed and 2D position for each horse at 4 updates per second) of the data make it a unique resource for questions in equine safety, welfare, performance, and animal locomotion.
  
  
  OBJECTIVE
  To determine the accuracy of the TurfTrax tracking system in estimating the speed and position of horses during racing.
  
  
  METHODS
  Measurements from the TurfTrax wireless tracking system were compared with those of a survey-grade global positioning system (GPS) receiver.
  
  
  RESULTS
  The TurfTrax system was found to give position measurements to within +/- 11 and +/- 64 cm in the fore-aft and lateral directions, respectively, averaging +/- 38 cm (interquartile range) and speed to within 0.15 m/s.
  
  
  CONCLUSIONS
  The data collected by the TurfTrax system are of sufficient accuracy to inform new diagnoses, training regimens and basic locomotor scientific studies. The position data can provide the precise distance, going, inclination, rate of turn and pack positioning through which each horse has raced. The speed profile can be used to examine the level of exertion, effect of training regimens and influence of racecourse features on performance. A first clinical application would be to analyse retrospectively these factors on occurrence of injury to compare with past training regimens, levels of exertion, and/or racecourse conditions.
authors.affiliation: Structure and Motion Laboratory, Royal Veterinary College, Hawkshead Lane, North Mymms, Hatfield, Hertfordshire AL9 7TA, UK.
authors.forename: A J
authors.initials: AJ
authors.lastname: Spence
authors.forename: H
authors.initials: H
authors.lastname: Tan
authors.forename: A
authors.initials: A
authors.lastname: Wilson
mesh_terms: D000827:Animal Welfare; D000818:Animals; D003625:Data Collection / Q000295:instrumentation* / Q000379:methods; D040362:Geographic Information Systems; D006736:Horses / Q000502:physiology*; D008124:Locomotion / Q000502:physiology; D010805:Physical Conditioning, Animal / Q000502:physiology*; D015203:Reproducibility of Results; D012420:Running / Q000502:physiology*; D012449:Safety; D012680:Sensitivity and Specificity; D013177:Sports