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ENERGY SYSTEMS
LESSON 5
Energy Continuum
LEARNING OBJECTIVES
1.
Can I explain how the three energy systems
work throughout an activity?
2.
Can I explain the factors affecting the energy
system used?
STARTER
 Explain
the controlling enzymes
for each energy system
 What
is a controlling enzyme?
 Which ones control which system?
CONTROLLING ENZYMES
Controlling
Enzymes
ATP/PC System Creatine kinase
Energy System
Lactic Acid
system
Aerobic System
Activator
Increase in ADP
Phosphofructoki Decrease in PC
nase
Phosphofructoki Increase in
adrenalin/decrea
nase
se in insulin
levels
ENERGY CONTINUUM


This is ‘the relative contribution of each
energy system to ATP re-synthesis
determined by the intensity and duration of
exercise.’
In any sporting situation, energy is provided by
all three energy systems, and the contribution of
each is determined by the intensity and the
duration of the exercise. Some activities/sports
are mainly aerobic while others are anaerobic.
Energy systems rarely work in isolation.
TASK 1

Identify the predominant energy system used in
the following types of exercise:
Activity
100m Sprinter
Shot Putter
Marathon Runner
800m Runner
Tennis Player
Netball Centre
Football Goalkeeper
Badminton
200m Swimmer
% ATP/PC
% Lactic Acid
% Aerobic
TASK 2

Explain how the following affects the energy
system used by athletes:
Exercise Intensity and Duration (above)
 Energy System Threshold
 O2 Transport/Supply
 Food/Fuel available
 Enzyme Activation Levels
 Fitness Level

PLENARY
 Discuss
how the Energy Continuum
works during a 800m Freestyle
Swimming Race