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The goal of the study was to analyze changes in the hematological parameters of show jumping horses in aerobic training during the yearly training cycle. We also tried to evaluate the effect of these changes on sport results of the horses. Twenty-six noble horses were studied in the research. The investigation lasted from October 2008 until September 2009. That period was divided into trimesters. In each trimester of the training cycle, blood indices (RBC, HGB, HCT, MCV, MCH, MCHC, RDW) were determined, and the Success Sport Index was calculated for each horse. Analysis of variance with repeated measurements and Spearman correlation coefficients were used for data analysis. All hematological parameters were within the normal range for horses. Changes in some parameters during the yearly training cycle were statistically significant. The values of RBC and HCT were significantly higher in trimester II, and these values coincided with a higher value of the Success Sport Index. MCH and MCHC gradually decreased in consecutive trimesters of the yearly training cycle. The lowest levels of HGB, MCH and MCHC were observed in the last trimester, that is, in the summer competition period, which may suggest some disorders in hemoglobin synthesis. Changes in these parameters were more pronounced in mares and geldings than in stallions. The blood indices and their correlations can provide useful information not only about the health status of the animal, but also about erythoropoiesis and hemoglobin synthesis. Analysis of hematological parameters should be performed regularly, and training cycles should be adjusted to erythoropoiesis.
The purpose of this study was to determine the effect of long-term exercise of varying intensity on selected hematological blood parameters of horses. The study was conducted on 24 clinically healthy half-blood horses. Blood for designations was collected twice: at the beginning of March, when the indoor season was approaching an end (a smaller number of starts), and at the end of May, when efforts were particularly intensified due to the continuous training and the beginning of the open season (more starts). The whole blood was examined for: the total number of erythrocytes (RBC), hematocrit (Ht), hemoglobin (Hb), mean corpuscular volume (MCV), mean corpuscular hemoglobin (MCH), mean corpuscular hemoglobin concentration (MCHC) and the red blood cell distribution width (RDW). The study was performed using an MS9 hematology analyzer. Mean values were compared between the retrievals (stallions and mares), and animals of both sexes were compared among themselves in collections I and II. The study showed that the growing physical effort of sport horses caused increased rates of hematological parameters, such as RBC, Ht, MCV, RDW in both stallions and mares in collection II compared to collection I. Studies of hematological parameters are an important element of planning and monitoring the workouts of horses.
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