ENERGY SYSTEMS

1
ENERGY SYSTEMS

• LESSON 5
• Energy Continuum

2
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?

3
STARTER

• Explain the controlling enzymes for each energy
  system
• What is a controlling enzyme?
• Which ones control which system?

4
CONTROLLING ENZYMES
Energy System Controlling Enzymes Activator
ATP/PC System Creatine kinase Increase in ADP
Lactic Acid system Phosphofructokinase Decrease in PC
Aerobic System Phosphofructokinase Increase in adrenalin/decrease in insulin levels
5
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.

6
TASK 1

• Identify the predominant energy system used in
  the following types of exercise

Activity ATP/PC Lactic Acid Aerobic
100m Sprinter      
Shot Putter      
Marathon Runner      
800m Runner      
Tennis Player      
Netball Centre      
Football Goalkeeper      
Badminton      
200m Swimmer      
7
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

8
PLENARY

• Discuss how the Energy Continuum works during a
  800m Freestyle Swimming Race