Cardiovascular and Metabolic Adaptations in Horses Competing in Cross-Country Events

Journal of Veterinary Medical Science

A. Muñoz¹  MD Rubio¹  EI Agüera¹  R. Santisteban¹  C. Riber¹ 

[1] Department of Animal Biology, Section of Physiology, Faculty of Veterinary Medicine, Campus Universitario de Rabanales, Edif. C1, University of Có:rdoba, Có:rdoba 14071, Spain

关键词: equine (eventing horse);    haematology;    heart rate;    lactate;   

DOI  :  10.1292/jvms.61.13

学科分类：兽医学

来源: Japanese Society of Veterinary Science

【 摘 要 】

References(39)Cited-By(8)The cardiovascular and metabolic response to two cross-country events (CC*: preliminary level and CC*** advanced level) were analysed in 8 male eventing horses (4 Anglo-Hunter and 4 Anglo-Arabian). This study focused on the establishment of the main metabolic pathways involved in the muscle energy resynthesis during the competitions. Heart rate (HR) was recorded throughout the CC events. Jugular venous blood samples were withdrawn before the warm-up period, immediately after the competitions and at 5 and 10 min in the recuperation period. The following haematological parameters were studied: red blood cells (RBC), packed cell volume (PCV), haemoglobin concentration (Hb), mean corpuscular volume (MCV), mean corpuscular haemoglobin (MCH), mean corpuscular haemoglobin concentration (MCHC), white blood cells (WBC), and number and percentages of lymphocytes (LYM) and granulocytes and monocytes (GRAN). One fraction of blood was centrifuged and, in plasma, lactate (LA), total plasma protein (TPP) and the rate of LA disappearance were determined. The competitions induced significant increases in RBC, Hb, PCV, MCV and TPP. Plasma LA response exceeded the anaerobic threshold of 4 mmol/l, reaching a maximum level of 13.3 mmol/l. HR ranged from 140 to more than 200 bpm, peaking at 230 bpm, revealing a limitation in the oxygen supply to the working muscles. It was concluded that muscle energy resynthesis during a CC event is provided both through oxidative processes and glycolysis with LA formation. Therefore, both stamina and power exercises are required for eventing horses.

【 授权许可】

Unknown