The aerobic energy system involves the breakdown of food fuels (carbohydrates, fats and proteins) in order to produce ATP.
Food fuels such as glucose stored as glycogen in the muscles and liver is broken down in the presence of oxygen to form CO2 and water without build up of lactic acid. *Activity 6 - Draw Diagram 15.4
The energy released in Aerobic Glycolysis is used to form large quantities of ATP. One glucose molecule ( 38 ATP. (2 vs 38 !!)
When glucose is broken down in the presence of oxygen,
________ _______ is not accumulated. This is the MAJOR difference between Aerobic and ANAEROBIC.
The Aerobic system is the MAJOR producer of ATP for
_____ _____ activities that are performed at _________ intensity. (sub-maximally).
The aerobic system is working all the time. When sitting, oxygen supply = oxygen demand.
It begins producing more ATP soon after the start of constant activity, but does not become the MAJOR PRODUCER until after 90 seconds of activity.
Before this, ATP production is mainly due to the ANAEROBIC SYSTEMS.
It should be noted that there is no definite time when one
ATP source stops and another starts. There is considerable overlap.
*Activity 7 Diagram 15.7 – Energy Pathways The Energy Continuum
OXYGEN DEFICIT AND OXYGEN DEBT.
OXYGEN DEFICIT is the period of time that it takes the
body to increase the breathing rate enough to supply
sufficient O2 to the working muscles.
This means the aerobic system can supply most of ATP.