Transcript Energy Systems - MelsSchoolSite

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