Originally Posted by nesdog
"After exercise begins, however, sympathetic nervous system hormones inhibit GI impact on insulin release. Unless your caloric intake exceeds the maximum that the liver can return to the body in the form of glycogen (about 280 calories per hour) glycemic index is not a major factor in choosing energy sources."
Sheldon - that's interesting. Thing is, a cyclist doing a century ride will need well over 280 calories per hour. Even at 17mph on flat ground a 160-lbs cyclist needs over 600 calories an hour.