Se determinó y analizó el comportamiento de los electrolitos sodio (Na+), cloro (Cl-) y potasio (K+) en equinos atletas de alto rendimiento en salto en Bogotá, con el fin de establecer los valores normales en reposo y la respuesta de los electrolitos al ejercicio. Las muestras fueron tomadas en la Escuela de Equitación del Ejército Nacional, Club los Arrayanes y la Escuela de Carabineros de la Policía Nacional (CESPO) en la ciudad de Bogotá. Se utilizaron 40 equinos deportistas de salto alto, hembras y machos, entre los 6 y los 12 años de edad. Se tomaron muestras en cuatro tiempos: T0 (Reposo), T1 (inmediatamente después de los saltos), T2 (entre media y una hora después de los saltos) y T3 (entre la 1 hora y hora y media después de los saltos). Como resultado se obtuvo los valores normales en los diferentes tiempos y se estableció la curva de comportamiento de los electrolitos. Los valores obtenidos en mmol/L fueron: para el T0: Sodio: 140.70+/-2.61, Potasio: 3.67+/-0.98, Cloro: 101.76+/-1.48; para el T1: Sodio: 130.56+/-34.59, Potasio: 4.34+/-0.29, Cloro: 103.81+/-2.07; para el T2 Sodio: 129.92+/-33.48 Potasio: 3.79+/-0.29, Cloro: 10.1.21+/-2.22; y, por último, el T3: Sodio: 139.07+/- 3.96, Potasio: 3.90+/-0.37, Cloro: 101.07+/-2.28. Este trabajo es un gran aporte a la medicina deportiva del país ya que esta información no existía en el país y se puede trabajar ahora la medicina deportiva con fundamentos científicos.

This research intends to be a contribution to the Colombian sports equine medicine by providing data on electrolytes standards, a field where there is a substantial lack of literature. This research analyze and determines the normal values of sodium (Na+),potassium (K+) and ion calcium (iCa2+) electrolytes for Colombian Paso Fine horses. The establishment of the reference intervals was done at rest and after exercise. To achieve this, blood samples were taken from farms located in the Bogotá savannah. The 115 mares and stallions used for this study were actively competing with ages ranging from 43 to 78 months old. The samples were taken at three intervals: T0 (Rest),T1 (immediately after 45 minutes of exercise), and T2(1 hour post exercise). The samples were processed using a portable blood analyzer i-STAT® and the data was interpreted using descriptive and comparative statistic according to Turkey tests. The normal values for the breed were established and an electrolytic behavior curve was created, using values inside interval sat 95% confidence levels. The values obtained inmEq/L were: for T0: Na+ (136,71+/-23), K+ (4,05+/-03), Ca2+ (1,58+/-006); for T1: Na+ (136,44+/-24), K+ (3,92+/-24), Ca2+ (1,42+/-008); and for T2: Na+ (137,32+/-23), K+ (3,68+/-03), Ca2+(1,51+/-009). Na+ values increased after exercise. On the contrary K+ and Ca2+ values didn’t increase inT1. Calcium increased on T2 and K+ decreased. The findings of this research will serve as a framework for future analysis. Moreover, further studies and developments in this field are recommended and will prove to be very useful for equine practitioners.

Nutrition has a strong influence on the reproductive performance of female cattle, but not much is known about the mechanism through which such performance is affected. Moreover, recent studies have proved that, as a nutritional signal, metabolic hormones exert a direct effect on the ovary. Treatment with recombinant bovine somatotropin (rGH) in cattle significantly increases the colony of small ovarian follicles. Subsequent studies, both in vitro and in vivo, have demonstrated the importance of the joint action of IGF-I or insulin with FSH and LH. Recent work has aimed to solve some practical problems in dairy cattle reproduction. First of all, it was found that both the pretreatment with rGH and the increased food intake significantly improve embryo viability. Second of all, a slight increase in voluntary consumption during the formulation of diets to increase insulin concentration during early lactation shows that these animals reach the first postpartum ovulation more quickly, and it also shows an increased conception rate to first service. In short, nutrition influences ovarian ac-tivity, allowing follicle development in female bovines, possibly through changes in metabolic hormones. These interactions can be manipulated to improve reproductive performance in these animals.