Footage of Catalytic, a race horse, warming up on the track in preparation for the Kentucky Derby at Churchill Downs

catalytic horse warming up track kentucky derby churchill downs race preparation louisville usa equestrian thoroughbred racing sport event iconic racecourse training exercise routine prerace horse racing tradition annual event jockey stable equine practice competition historic famous american race day excitement performance conditioning handler trainer early morning athletic race training horse care equine health spring event prestigious racing venue horse exercise