Acid-base variables during incremental exercise in sprint-trained horses fed a high-fat diet.

摘要: Seven Arabian horses performed a standard incremental exercise test on high-speed treadmill at 6% slope then were randomly assigned to two diets, control diet of ground hay and concentrates similar with 10% added fat (by weight). Horses sprint-trained 4 d/wk, additional tests 5-wk intervals. Heart rates rectal temperatures monitored venous blood samples collected rest each speed increment. Whole was analyzed for glucose, lactate, hemoglobin concentrations, plasma pH, pCO 2 , albumin, total protein, sodium, potassium, chloride concentrations. Bicarbonate concentration ([HCO 3 - ]) strong ion difference ([SID]) calculated, weak acid ([A tot estimated from protein. During exercise, there increases in sodium potassium concentrations (P <.001), whole lactate glucose < .001), <.01). There decreases [HCO ], <.001). The decrease pH associated changes [SID] [A ] that combined offset . After sprint training, heart during submaximal decreased <.01), whereas the end increased <.05). Sprint training also workrate oxygen consumption rate 200 beats/min ( P Training duration attained .05). response x interactions consuming high-fat had higher both fatigue <.05) last test. Fat adaptation involving may influence glucolysis level pyruvate an