Today we review a meta-analysis examining the effect of consuming carbohydrates during prolonged endurance exercise on the use of skeletal muscle glycogen. The research synthesized data from 31 crossover studies involving both running and cycling, concluding that carbohydrate ingestion leads to a small but statistically significant reduction in net muscle glycogen utilisation, a process known as glycogen sparing. Although no consistent moderating factors like carbohydrate type or ingestion...