its used ussually only on the day of the show, your glycogen loading should be for 2-4days (number of days depends on genetics). A good place to start is predeplete (obviously, eating 50g/carbs, 50g/fats, 2g/prot/lb of body weight) then loading starts, during loading one should consume 1g carbs/KG (not lb) bodyweight every 2 hours, mixture of complex and simple carbs, minimizing fats and moderate protein intake, on the day of the show insulin is used throughout the day following the same carb intake scheme and right before the show (make sure to have a dextrose drink with you)