WACE Physical Education Studies ATAR Practice Questions - WACE ATAR Physical Education Studies Units 3 & 4 (SCSA Year 12 Assessment) Exam

The ATP-PC system provides 100% of energy for 10s, followed exclusively by anaerobic glycolysis until 45s. All three energy systems contribute from the onset, but anaerobic glycolysis becomes the dominant provider after 5–10 seconds. The aerobic system is inactive for the first 30 seconds until heart rate reaches maximum. Anaerobic glycolysis is the sole energy contributor throughout the entire 50-second race.