Aerobic Energy System Aerobic Energy System Alternative Name

Aerobic Energy System

Aerobic Energy System Alternative Name: Type of Activities Event Examples: Predominant: Main Advantage: Main Disadvantage: Aerobic Glycolysis Endurance, long duration Marathon, triathlon, cross country skiing >30 secs (approx. ) Unlimited energy supply during submaximal work Cannot supply energy quickly (slow rate)

Aerobic Energy System Fuels Used: Main (Minor) Glycogen, Fats Protein Byproducts: Water, Carbon dioxide, Heat Number of ATP made: 38 (using glucose) (high yield) 100+ (using fat) (high yield) Located where: Mitochondria Used when: At rest Sub maximal exercise Recovery

In Using 02 to Produce ATP • Oxygen allows for more complete break down of glucose. Pyruvic acid rather than becoming lactic acid is further broken down in the citric acid cycle and the electron transport chain in the mitochondria becoming ATP. • 0 xygen allows fats to contribute more to ATP production but cannot be produced as quickly as when glucose is used because it needs a more complex series of reactions. • Breaking down fat to convert into ATP requires a lot of O 2 to firstly break down fat and secondly to use in the chemical reaction to produce energy.

The Aerobic Systems 3 Stages Aerobic Glycolysis • Uses glycogen broken down to glucose • (By product pyruvic acid) Krebs Citric Acid Cycle • Uses pyruvic acid and fats (and protein) • By product carbon dioxide & (hydrogen ions) Electron Transport Chain • Uses hydrogen ions • By product water, heat