Ingestion CHO Within 1 h before exercisen Largely elevated blood glucose and insulinn Transient fall in plasma glucose with the onset exercisen Increased CHO oxidation raten Blunting of FA mobilization (insulin-mediated inhibition oflipolysis), and ↓fat oxidation in musclen Transient fall in plasma glucose with the onset exercise n Hyperinsulinemian Muscle contraction stimulate muscle glucose uptaken Exercise-induced normal liver glycogen output inhibited by CHOingestionn Still improved endurance exercise performance n Individual variations, try and erro