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Asian-Australas J Anim Sci > Volume 15(9); 2002 > Article
Animal Breeding and Genetics
Asian-Australasian Journal of Animal Sciences 2002;15(9): 1348-1353.
DOI: https://doi.org/10.5713/ajas.2002.1348    Published online January 1, 2002.
The Effects of Endurance Training on the Hemogram of the Horse
Y. K. Fan, J. C. Hsu, H. C. Peh, C. L. Tsang, S. P. Cheng, S. C. Chiu, J. C. Ju
Abstract
The purpose of this study was to evaluate the changes and readjustment capacity in the hematological characteristics of the horse during and after a prolonged training program. One pony and two hot-blooded horses were used in this study. Resting or basal blood parameters were assessed by collecting blood samples of the animals for 1 to 2 months prior to start of the training program. Each animal was subjected to arbitrary exercise for 30 min by an automatic hot trotter and was bled at 0, 15, 30, 45 (15 min of recovery), 60 (30 min of recovery), and 75 min (45 min of recovery) after onset of exercise. All animals were exercised 3 times a week over a five-month period. Hematological parameters including average white blood cell counts (WBC, 103/ l), erythrocyte concentrations (RBC, 106/ l), hematocrit (HCT, %), mean corpuscular volume (MCV, fl), number of platelets (PLT, 104/ l), hemoglobin concentration (Hb, g/dl), mean corpuscular hemoglobin (MCH, pg), and mean corpuscular hemoglobin concentration (MCHC, g/dl) were analyzed using an automatic cell counter. All animals showed that RBC, WBC, and HCT were significantly (p<0.05) increasing from 7.09, 8.55, and 43.5 to 8.11, 9.67, and 49.5, respectively, during the 30 min of exercise and were back to or lower than the initial basis (resting and 0 min) 30 min after exercise. However, no significant differences were detected in MCV (50.3-51.3 fl), MCH (17.2-17.4 pg), and MCHC (33.7-34.4 g/dl) values (p>0.05) regardless of the training periods. Similar trends were observed after 1, 3, 4, and 5 months of training when compared to the resting state. When these parameters were analyzed by the effect of training periods (month), mean WBC concentrations significantly reduced in the fourth and fifth month after onset of training compared to that in resting condition or the first month of training program (p<0.05). The RBC values elevated at the second month (9.40) and reaching a significantly low level (p<0.001) at the fifth month (8.62) after training compared to the first month of training (7.89). In conclusion, a mild training program enhances blood parameters gradually in both the horse and the pony. Therefore, an optimized training program is beneficial in promoting the endurance performance of the horse.
Keywords: Arbitrary Exercise; Endurance Training; Hematology; Horse


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