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Online Journal of Veterinary Research

(Including Medical and Laboratory Research)

Established 1994

ISSN 1328-925X


Volume 25 (7):473-480, 2021.

Heart rate and hematology before and after submaximal exercise in athletic horses.


Mehdi Sakha DVM PhD, Hasan Rahmani DVM.


Faculties of Veterinary Science, Islamic Azad University, Tehran, Shahid Bahonar University, Kerman, Iran




Sakha M, Rahmani H., Heart rate and hematology before and after submaximal exercise in athletic horses., Onl J Vet Res., 25 (7):473-480, 2021. Heart rates (HR) of ~60 bpm 10 minutes after intense exercise is a benchmark for performance in race horses. HR before and after a 1600 mt race and hematology correlations with performance in 19 race-horses is reported. Mean resting HR before race was ~36 bpm, reaching maximum of 132 bpm (P<0.05) during race. After race HR fell 16% by 1st minute, 29% by 2 min and ~51% by 5 min to reach resting rate of ~36 bpm by 60 minutes. However, 60% horses had HR of 60 bpm at 20 min with only 21% reaching normal HR by 30 minutes. The mean values of PCV (paced cell volume) and RBC (red blood cell) were 36.60 3.3 % and 6.8 0.88 M/ul at rest and 44.73 4.7 % and 9.28 1.32M/ul after exercise. We found that RBC were boosted ~30% (PCV) and PCV ~20 by racing.


Key words: Exercise, Horse, Heart, Hematocrit, cardiac response.