Quote:
Originally Posted by blackthroatedwind
Making a person who is profiting greatly from synthetic surfaces, as Michael Dickinson is, out to be some kind of saint is beyond ridiculous. It's almost as ridiculous as asserting that dirt has been the cause of injuries in racing, while ignoring the vast array of other reasons, and further suggesting that unproven synthetic surfaces will save horses.
Thank God every racetrack isn't buying this load of bunk.
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You can go to PubMed, and enter as search terms thoroughbred and then alternately track, fracture, catastrophic, etc. going back to the early 1990's, to see the science behind why synthetic surfaces have been developed.
http://www.ncbi.nlm.nih.gov/sites/entrez
Here's something from 1995:
Am J Vet Res. 2005 Apr;66(4):589-95.Links
Relationships between hoof-acceleration patterns of galloping horses and dynamic properties of the track.Ratzlaff MH, Wilson PD, Hutton DV, Slinker BK.Department of Veterinary and Comparative Anatomy, Pharmacology, and Physiology, College of Veterinary Medicine, Washington State University, Pullman, WA 99164, USA.
OBJECTIVE: To define relationships between hoof-acceleration patterns of galloping horses and dynamic properties of the track. ANIMALS: 8 Thoroughbred horses without lameness. PROCEDURE: Acceleration-time curves were recorded by use of accelerometers attached to each hoof as each horse galloped over the track straightaway. Four sessions were conducted for each horse, with the track surface modified by sequentially adding water before each session. These acceleration-time curves were analyzed to determine peak accelerations during the support phase of the stride. Track dynamic properties (hardness, rebound, deceleration rate, rebound rate, and penetration) were recorded with a track-testing device. Moisture content and dry density were measured from soil samples. Stepwise multiple regression was used to identify relationships between hoof-acceleration variables and track dynamic properties. RESULTS: Track rebound rate was most consistently related to hoof variables, especially through an inverse relationship with negative acceleration peaks for all hooves. Also, rebound rate was related to initial acceleration peak during propulsion of the hooves of the forelimb and the nonlead hind limb as well as to the second acceleration peak during propulsion of the lead hooves of the hind limb and nonlead forelimb. CONCLUSIONS AND CLINICAL RELEVANCE: The inverse relationship between track rebound rate and negative acceleration peaks for all hooves reflects the most important dynamic property of a track. Any factor that reduces negative acceleration of the hooves will increase stride efficiency by allowing smoother transition from retardation to propulsion and therefore may be important in determining the safety of racing surfaces.
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