Route of carbohydrate administration affects early post exercise muscle glycogen storage in horses

Abstract

Glucose supplementation via the i.v. route should be considered when rapid replenishment of muscle glycogen stores is desired.

Effects of leucine or whey protein addition to an oral glucose solution on serum insulin, plasma glucose and plasma amino acid responses in horses at rest and following exercise

“…The peak serum insulin concentrations in horses following administration of GL supplement (∼70 µiu/ml; Fig 1) were similar to the mean serum insulin concentration (75 µiu/ml) during a 0.5 g/kg bwt/h i.v. infusion of glucose (Geor et al . 2006) and were substantially higher than mean serum insulin concentrations following oral glucose (35 µiu/ml) (Geor et al .…”

“…infusion of glucose (Geor et al . 2006) and were substantially higher than mean serum insulin concentrations following oral glucose (35 µiu/ml) (Geor et al . 2006) or high soluble carbohydrate intake (<∼25 µiu/ml) (Lacombe et al .…”

“…Furthermore, the insulinaemic response to the oral glucose was ∼50% lower than with i.v. glucose administration (Geor et al . 2006).…”

“…glucose infusion and the rates of glycogen synthesis in the first 6–8 h post exercise were ∼50% lower (Lacombe et al . 2004; Geor et al . 2006; Jose‐Cunilleras et al .…”

Fluid and electrolyte supplementation after prolonged moderate-intensity exercise enhances muscle glycogen resynthesis in Standardbred horses

“…Previous studies in horses have altered postexercise nutrition strategies in attempts to enhance muscle glycogen resynthesis. Despite demonstrations that intravenous infusion of large amounts of glucose (3-6 g/kg) modestly accelerated muscle glycogen replenishment (14,17), conventional feeding strategies have not been successful (23,(53)(54)(55). Initial glycogen resynthesis rates in horses after ingestion of meals with varying soluble carbohydrate (CHO) contents ranged from ϳ8 to ϳ12 mmol⅐kg dry wt Ϫ1 ⅐h Ϫ1 for mixed and high-soluble CHO diets, respectively.…”