View article

The purpose of this study was to examine the influence of a carbohydrate-rich meal on post-prandial metabolic responses and skeletal muscle glycogen concentration. After an overnight fast, eight male recreational/club endurance runners ingested a carbohydrate (CHO) meal (2.5 g CHO · kg⁻¹ body mass) and biopsies were obtained from the vastus lateralis muscle before and 3 h after the meal. Ingestion of the meal resulted in a 10.6 ± 2.5% (P < 0.05) increase in muscle glycogen concentration (pre-meal vs post-meal: 314.0 ± 33.9 vs 347.3 ± 31.3 mmol · kg⁻¹ dry weight). Three hours after ingestion, mean serum insulin concentrations had not returned to pre-feeding values (0 min vs 180 min: 45 ± 4 vs 143 ± 21 pmol · l⁻¹). On a separate occasion, six similar individuals ingested the meal or fasted for a further 3 h during which time expired air samples were collected to estimate the amount of …