Dietary interventions were as follows : breakfasts with a high GI ( @ @ % ) and high fiber ( @ @ g ) ( HGI-HF ) , a high GI ( @ @ % ) and low fiber ( @ @ g ) ( HGI-LF ) , a low GI ( @ @ % ) and high fiber ( @ @ g ) ( LGI-HF ) , and a low GI ( @ @ % ) and low fiber ( @ @ g ) ( LGI-LF ) .