PE food fuels and energy system Unit 1 AOS 3

ATP

Adenosine triphosphate, the primary energy carrier in cells.

ATP Resynthesis

The process of rebuilding ATP by joining free phosphate to ADP.

Glycogen

A stored form of glucose, found in muscles and the liver, used for energy.

Phosphate Creatine

A chemical fuel used in the ATP-PC system for quick energy production.

Carbohydrates

Organic compounds broken down into glucose to provide energy.

Glycaemic Index

A ranking of carbohydrates based on their effect on blood sugar levels.

High GI Foods

Foods with a glycaemic index above 70, rapidly raising blood sugar levels.

Anaerobic Glycolysis System

An energy system that produces ATP through the breakdown of glycogen without oxygen.

Lactate

A byproduct of anaerobic metabolism that can lead to fatigue.

Aerobic Energy System

An energy system that produces ATP in the presence of oxygen, utilizing glycogen, fats, and sometimes proteins.

Anaerobic Energy Pathway

Energy production pathway that occurs without oxygen, allowing for high-intensity efforts.

Creatine Phosphate

A molecule that donates a phosphate group to ADP to regenerate ATP.

Fatiguing By-Products

Metabolic waste like hydrogen ions that lead to muscle fatigue during high-intensity exercise.

Triglycerides

Fats stored in the body that are used as a source of energy.

Chemical Fuels

Substances that can be broken down to release energy, such as glucose and fats.

Key factors affecting ATP resynthesis during exercise.

Duration and Intensity