Zusammenfassung

Equestrian sports are in connection, firstly with the physical stress that can induce mental horse's stress. Horse training is not easy to define. It is achieving concentration and fitness for a certain type of equestrian sport where a preservation of health, psychological condition, physical condition and longevity is a necessity. In equestrian sport, the better result is needed over the long period of time. Many authors describe the lactate concentrations as a parameter of fitness of the horse, which means, in equestrian sports, a result. A horse with a lower lactate level is fitter, which means that the muscle tissue produces less lactic acid which is converted in blood into the lactate ion. Researches have been made on Holstein studs and a Croatian sports horse breeding type that have been trained and bred in the same conditions. There were two groups of jumping horses in training. Younger horses gain uniformity throughout the competition season and come closer to the older group of horses in results. Younger horses gain experience through training and physical work understand as a routine; their body gains better fitness demanded by show jumping sports.