A comparison of isomaltulose versus maltodextrin ingestion during soccer-specific exercise

Purpose: The performance and physiological effects of isomaltulose and maltodextrin consumed intermittently during prolonged soccer-specific exercise were investigated. Methods: University soccer players (n=22) performed 120-min of intermittent exercise while consuming 8% carbohydrate-electrolyte drinks (equivalent to ~20 g·h-1) containing maltodextrin (Glycaemic Index: 90-100), isomaltulose (Glycaemic Index: 32) or a carbohydrate-energy-free placebo in a manner replicating the practices of soccer players (i.e., during warm-up and half-time). Physical (sprinting, jumping) and technical (shooting, dribbling) performance was assessed. Results: Blood glucose and plasma insulin (both P13% higher blood glucose concentrations between 75-90-min versus maltodextrin (P0.05). Ratings of abdominal discomfort were influenced by trial (P