Energy Systems

What this page covers

This unit collects study material on how the body makes energy for movement. Most of it follows the three-part picture: the ATP-PC system (also called the alactacid or phosphagen system), anaerobic glycolysis (the lactic acid system) and the aerobic system. Several resources go further into exercise metabolism, fuels and how training changes the way muscles use them.

Where to start

Begin with a broad mind map. The map WCC VCE PE: Energy Systems sets out the anaerobic and aerobic systems and compares them by fuel, rate, yield and by-products. ATP ENERGY SYSTEMS shows how ATP stores and releases chemical energy for muscle contractions. The ATP-PC System flowchart walks through ATP breaking down into ADP and phosphate, step by step.

Next, move to the single-system maps, such as Lactic Acid System, Anaerobic Glycolysis and Aerobic systems. Read one at a time, so each system is clear before you compare them.

Using quizzes and maps together

Quizzes are a small part of this page, so use them as checkpoints. Try ATP-PC System or The Aerobic Energy System after reading the matching map. Any question you miss tells you which branch to reread. Then test yourself again with a flashcard deck such as Characteristics of the Three Energy Systems.

Going deeper

For longer exam answers, read the note on energy system interplay. It explains that questions can ask you to identify a dominant energy system or to discuss how the systems work together. The resources mention A-level Physical Education, GCSE PE and VCE PE, so school students will find familiar material. Decks such as Protein Metabolisum and Exercise and Bioenergetics suit university students and professional candidates. Teachers can pick maps to share with a class.

Where it fits

This unit sits in the strand Applied Anatomy, Physiology and Biomechanics, within Physical education and sport. Pick a map that matches your course, then make your own maps and flashcards to fill any gaps.