The progression of energy system utilization during high-intensity exercise is likely stored ATP, then phosphocreatine, then glycolysis, and finally beta-oxidation.

“I think like if you say that okay now it's first ATP first we use stored ATP and then we shift to PCR and then it becomes glycolytic and then basically we go off to beta oxidation this is rather more I think the more correct way to view this basic the reason why you can have a high power output short and high power output is because you able to supply from all the energy systems instantaneously but then you're depleting the different then all of a sudden the the phosphated creatine comes down immediately and then the glycolytic and then yeah yeah yeah then that's where you're yeah yeah that makes sense yeah”