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Forelimb skeletal scintigraphy responses in previously untrained Thoroughbreds undergoing initial treadmill training
Article first published online: 10 JUN 2010
© 2002 EVJ Ltd
Equine Veterinary Journal
Volume 34, Issue S34, pages 230–235, September 2002
How to Cite
FOREMAN, J. H., KNELLER, S. K., TWARDOCK, A. R., CHAMBERS, M. D. and INOUE, O. J. (2002), Forelimb skeletal scintigraphy responses in previously untrained Thoroughbreds undergoing initial treadmill training. Equine Veterinary Journal, 34: 230–235. doi: 10.1111/j.2042-3306.2002.tb05424.x
- Issue published online: 10 JUN 2010
- Article first published online: 10 JUN 2010
Scintigraphy has been used in numerous clinical settings to examine horses to determine the origin of lameness problems, but it has not been used previously to monitor prospectively the skeletal responses of a group of similarly-trained racehorses. Our hypothesis was that in naive Thoroughbred (TB) racehorses, initial treadmill training induces increased radiopharmaceutical uptake in high-motion joints and in the dorsal third metacarpal bone (MC3). Eight previously-untrained TB racehorses underwent sequential skeletal scintigraphic examinations as they exercised daily for 9 weeks on an inclined treadmill. At the end of Weeks 0 (pre-training), 3 (trotting at 4.2 m/s and initial galloping), 6 (galloping at 7.5 m/s), and 9 (sprinting 600 m at 12.5 m/s), horses received 140 mCi 99m Technetium-methylene diphosphonate i.v. followed by a standard skeletal scintigraphic forelimb examination 2 h later. Views were graded for increased radiopharmaceutical uptake by 3 co-investigators who were blinded to horse identification, breed, sex, date, and clinical findings. Results were compared before and after training for each skeletal location using the Mann-Whitney Rank Sum Test with the level of significance set at P<0.05. Initial treadmill training resulted in increased radiopharmaceutical uptake in the carpus (P = 0.031), metacarpophalangeal joint (P = 0.021), proximal phalanx (P = 0.035), and distal phalanx (P = 0.003). Training did not affect dorsal MC3 radiopharmaceutical uptake (P>0.05).