the United States, which are banned elsewhere, are responsible for the higher death rate in the United States. In the Canadian province of Ontario, a study of 1,709 racehorse deaths between 2003 and 2015 found that the majority of deaths were attributable to "damage during exercise to the horses' musculoskeletal system", including fractures, dislocations, and tendon ruptures. Mortality rates were eight times higher for thoroughbreds than standardbreds, and highest amongst young horses. The study also found that the incidence of off-track deaths was twice as high for thoroughbreds. In the United Kingdom, 186 horses were killed as a direct result of racing in 2019. Of these 145 died in National Hunt (jump) racing and 41 in flat racing. A report published in 2005 estimated that "around 375 horses who are entered into races each season die from their injuries, or they are killed because they are considered of no further commercial value, even though they are young enough to continue racing." It added, "Reasons for horses being destroyed include broken legs, back, neck and pelvis; fatal spinal injuries, exhaustion, heart attack, and burst blood vessels in the lungs." See also Australian and New Zealand punting glossary Commercial animal cloning Fully automatic time Glossary of North American horse racing Going (horse racing) Horse length Horse racing equipment Jockey Challenge List of historical horses List of horse racing tracks List of jockeys Match race References Bibliography External links Equestrian sports