The purpose of this study was to analyze the effects of race track surface condition on the racing time of Thoroughbred racehorses in flat races isolated from the effects of differences in racecourse and racing distance. The effects of track surface condition, racecourse, and racing distance on the racing time of Thoroughbreds in flat races at 10 Japan Racing Association racecourses during a period of 5 years (2000-2004) were evaluated using multiple linear regression analysis. Track surface condition significantly affected the race time, although this effect differed between turf and dirt courses. On turf courses, racing times for different track surface conditions were, from shortest to longest, in order of firm展开▼
