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WAPhysical EducationQuick questions
Unit 3: Factors Affecting Performance
Quick questions on Energy system interplay: WACE Physical Education Studies Unit 3
2short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is the systems work together?Show answer
At no point does only one energy system supply ATP. From the first second of exercise all three contribute, but their relative shares change. It is more accurate to talk about which system predominates than which system is being used, because all are always active to some degree.
What is the start of exercise?Show answer
When exercise begins, oxygen delivery cannot rise instantly to meet demand, creating an oxygen deficit. The ATP-PC and anaerobic glycolytic systems cover this early shortfall. As heart rate, breathing and blood flow increase, the aerobic contribution grows until, at a submaximal intensity, it can meet demand and the body reaches a steady state where supply matches demand.
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