In 100-m dash, most of the energy consumed by skeletal muscles to replenish ATP is derived from

In a 100-m dash that takes 10s , 85% of the energy consumed is derived anaerobically by Phosphocreatine, which is hydrolysed to creatine and phosphate groups with the release of considerable energy. Ref: Guyton And Hall Textbook of Medical Physiology 13th edition Pgno: 82