What energy system is used for 100M freestyle?

The primary energy system used for the 100-meter freestyle is the anaerobic alactic system, which provides energy through the breakdown of stored ATP and creatine phosphate without the need for oxygen. This system is crucial for high-intensity efforts lasting up to about 10 seconds. As the race progresses beyond that point, anaerobic glycolysis may also contribute, but the focus remains on quick, explosive energy release. Overall, sprinters rely heavily on these anaerobic pathways to maximize their speed and power during the event.