Energy Systems. Introduction Your body needs energy for basic body functions an activity during your whole life. The interaction between muscles and bones.

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Presentation transcript:

Energy Systems

Introduction Your body needs energy for basic body functions an activity during your whole life. The interaction between muscles and bones keeps the body upright and under control. To allow this teamwork between the muscular and skeletal system the body needs energy sources. The chemical compound adenosine triphosphate (ATP) provides the energy that allows muscular effort.

Sources of ATP ATP is an end product of your diet. The components of a healthy diet are carbohydrates, fats and proteins.

The Energy Systems There are three energy systems that are used for the production of ATP. These three systems are called: – ATP-PC System – Anaerobic Glycolysis System – Aerobic Energy System

ATP-PC System This is the fastest of all three systems for the production of energy. It works by breaking down creatine phosphate. It is the first pathway used by the body for the production of energy. This system provides the bulk of the ATP during powerful or explosive efforts. These efforts may include a take-off in high jump, a sprint to a position in netball. This system is only predominant for the first 10 seconds because beyond this point the system is largely depleted. It can take around 3-5 minutes to restore the ATP and Phosphocreatine to pre exercise levels.

Anaerobic Glycolysis System Also known as the lactic acid system. Mainly provides the ATP for the bulk of ATP production during high intensity, sub maximal efforts. This system acts as the dominant supplier of ATP in the period from around 10 seconds of maximal effort to around 60 seconds. Examples of when the Anaerobic Glycolysis system would be the predominant include a 400m race. With an active recovery this system will be ready for a repeat effort after approx 30 minutes.

Aerobic Energy System Is also known as aerobic glycolysis system. It is the major contributor to ATP production during continuous sub-maximal activities that go beyond 1 minute. Examples of when the aerobic energy system is the predominant contributor include marathons. Once the body glycogen stores have been restored, this takes 6-48hrs, the system is ready for a repeat effort.

Interplay of the Energy System It is important to note that each system begins working at the beginning of an activity, however, the predominant system changes over time.

Of the following which predominantly use the ATP-PC system, with the anaerobic system and which the aerobic system? Marathon 50m swim Golf drive Tennis serve Elite netball centre in close game Rowing 2000m race AFL mid field Fast break in water polo Triatholn Gymnastics Vault High mark in AFL Repeated leads by AFL full forward

Questions… 1.What does ATP stand for? 2.What about PC? 3.Which system is predominant during a maximal effort? 4.How long does each system last? 5.A person is running a 1500m race, discuss the interplay of the three energy systems.

Answers… 1.Adenosine Triphosphate 2.Phosphocreatine 3.ATP-PC System 4.ATP-PC = 10 second Anaerobic Glycolysis = up to 1 minute Aerobic Glycolysis = over 1 minute